{"id":{"repo_id":"aachen","oai_identifier":"oai:publications.rwth-aachen.de:61204"},"canonical_url":"https://search.dev.ndltd.org/etd/aachen/oai:publications.rwth-aachen.de:61204","repository":{"repo_id":"aachen","name":"RWTH Aachen University","base_url":"https://publications.rwth-aachen.de/oai2d"},"display":{"title":"Quantum transport through single molecules","abstract":"The field of molecular electronics experienced an enormous boost in both experiment and theory in the last few years. Addressing a single molecule is not only of technological interest, also fundamental physical questions arise: Are single molecules the ultimate step in the miniaturization of transistors? Are single molecules suitable for the storage of quantum information? How do tunneling electrons influence molecular magnets? Do single molecules exhibit quantum tunneling of the magnetic moment? Subject of this thesis is the theoretical description and analysis of electron transport through single molecules. Therefore transport models are developed that take into account the special magnetic, electronic and electro-chemical properties of the molecules of interest. One advantage of this approach is that model parameters can be fixed by ab-initio calculations which allows a comparison to experiments. Another advantage is that a huge class of molecules with similar properties can be described by these models. The models are studied in different transport regimes: in the regime of weak coupling between molecule and electrode a master equation approach is used which captures the non-equilibrium imposed by the applied bias voltage correctly. In the strong coupling regime and for an equilibrium situation the non-perturbative numerical renormalization group is the method of choice. In the following, the main topics addressed in this thesis are summarized. Charge induced spin blockade in grid molecules. Grid molecules incorporate transition metal ions that are held by organic ligands on the edges of a grid. The building units and the geometry of these molecules are designable in an extraordinary way: metal ions with different spin as well as ligands with different electronic properties may be used. In addition different sizes of grids can be realized. Based on the geometric and electronic structure a minimal transport model is developed. Interestingly, the Nagaoka mechanism, well-known from solid state physics, becomes effective and leads to maximal spin ground states or energetically low lying excitations for certain charge states. These states show drastic effects in transport experiments: a complete current suppression at small but finite bias voltage and negative differential conductance. Very recently performed transport experiments in the group of Herre van der Zant (Delft) show a complete current suppression in some samples. Transport experiments through a molecular magnet Transport experiments through single magnetic molecules (Mn$_{12}$) have been recently reported by the groups of Herre van der Zant (Delft) and Hongkun Park (Harvard) that show fingerprints of the magnetic anisotropy and the large spin which are generic properties of these molecules. These pioneering works point to a new direction in the study of molecular magnets: In contrast to experiments on clusters of these molecules where magnetic properties are related to single molecule properties under the assumption that the intermolecular interactions are weak, in transport experiments individual molecules can directly be addressed. Taking into account their intrinsic properties, a transport model is analyzed in this thesis that explains the key features of the Delft experiment, a compete current blockade of the order of the magnetic anisotropy barrier and negative differential conductance. Remarkably, both effects can be traced back to a cascade of electron tunneling processes into blocking states that suppress the current. Contrary to similar effects in quantum dots the spin blockade in molecular magnets is caused by a relay of blocking states. Transport fingerprints of the quantum tunneling of the magnetic moment. The quantum tunneling of the magnetic moment in clusters of single molecule magnets has been the focus of intensive experimental and theoretical research. In this thesis we show that quantum tunneling leads to unique signatures in transport experiments where single molecule magnets are trapped in three-terminal setups in the regimes of weak and strong coupling between molecule and electrode. In the weak coupling regime resonances in the conductance that do not correspond to molecular addition energies are caused by the quantum tunneling. On the one hand these \"fake\" resonances are clear fingerprints of the quantum tunneling, on the other hand they complicate the transport spectroscopy. We show that measuring the shot-noise helps to distinguish these resonances from those caused by the molecular spectrum. \"Fake\" resonances arise due to strong asymmetries in the rates and have already been discussed in quantum dots. However, the microscopic origin of the asymmetry in the rates in the latter systems is not clear in contrast to single molecule magnets: The quantum tunneling is a generic small parameter that induces asymmetric rates. Furthermore we show how the magnetic anisotropy leads to negative differential conductance and a complete current suppression. In the strong coupling limit we predict for single molecule magnets a zero-bias anomaly in the conductance, the Kondo effect. This effect is well-known from quantum dots but has not been discussed for single molecule magnets yet. Even though in these systems the spin is (nearly) fixed along an easy axis deviations from perfect axial symmetry lead to spin fluctuations that are enhanced by the coupling to the electrode. The dependence of the Kondo effect on generic molecular properties as the spin, the strength of the magnetic anisotropy and its symmetry, are analyzed in detail. We compare the results of the non-perturbative numerical renormalization group with a \"poor man's scaling\" analysis of an effective model which gives insight in the processes leading to Kondo physics. The discussed effective model, specific for molecular magnets, is a full anisotropic Kondo model which has not been considered for quantum dots. Remarkably, under certain conditions a large half-integer molecular spin compensates the magnetic anisotropy and leads to an enhancement of the Kondo effect. Additionally, we predict a spin selection rule for the Kondo effect to occur based on the symmetry of the quantum tunneling. This selection rule is decisively different from the even-odd alternation known from quantum dots. Magnetic fields usually suppress Kondo correlations. Again single molecule magnets have extraordinary properties: The Kondo effect can be induced and suppressed several times depending on the magnitude of the molecular spin. It shows reentrant behavior as function of a longitudinal magnetic field. Hence the Kondo effect can be investigated for integer spin systems and the change of the spin by a gate voltage is no longer necessary. Furthermore we set up a correspondence of the conductance fingerprints for adjacent spin states. This allows a determination of the magnitude of the spin and the molecular anisotropies in the experiment.","abstract_html":"The field of molecular electronics experienced an enormous boost in both experiment and theory in the last few years. Addressing a single molecule is not only of technological interest, also fundamental physical questions arise: Are single molecules the ultimate step in the miniaturization of transistors? Are single molecules suitable for the storage of quantum information? How do tunneling electrons influence molecular magnets? Do single molecules exhibit quantum tunneling of the magnetic moment? Subject of this thesis is the theoretical description and analysis of electron transport through single molecules. Therefore transport models are developed that take into account the special magnetic, electronic and electro-chemical properties of the molecules of interest. One advantage of this approach is that model parameters can be fixed by ab-initio calculations which allows a comparison to experiments. Another advantage is that a huge class of molecules with similar properties can be described by these models. The models are studied in different transport regimes: in the regime of weak coupling between molecule and electrode a master equation approach is used which captures the non-equilibrium imposed by the applied bias voltage correctly. In the strong coupling regime and for an equilibrium situation the non-perturbative numerical renormalization group is the method of choice. In the following, the main topics addressed in this thesis are summarized. Charge induced spin blockade in grid molecules. Grid molecules incorporate transition metal ions that are held by organic ligands on the edges of a grid. The building units and the geometry of these molecules are designable in an extraordinary way: metal ions with different spin as well as ligands with different electronic properties may be used. In addition different sizes of grids can be realized. Based on the geometric and electronic structure a minimal transport model is developed. Interestingly, the Nagaoka mechanism, well-known from solid state physics, becomes effective and leads to maximal spin ground states or energetically low lying excitations for certain charge states. These states show drastic effects in transport experiments: a complete current suppression at small but finite bias voltage and negative differential conductance. Very recently performed transport experiments in the group of Herre van der Zant (Delft) show a complete current suppression in some samples. Transport experiments through a molecular magnet Transport experiments through single magnetic molecules (Mn<span class=\"etd-inline-math\"><sub>12</sub></span>) have been recently reported by the groups of Herre van der Zant (Delft) and Hongkun Park (Harvard) that show fingerprints of the magnetic anisotropy and the large spin which are generic properties of these molecules. These pioneering works point to a new direction in the study of molecular magnets: In contrast to experiments on clusters of these molecules where magnetic properties are related to single molecule properties under the assumption that the intermolecular interactions are weak, in transport experiments individual molecules can directly be addressed. Taking into account their intrinsic properties, a transport model is analyzed in this thesis that explains the key features of the Delft experiment, a compete current blockade of the order of the magnetic anisotropy barrier and negative differential conductance. Remarkably, both effects can be traced back to a cascade of electron tunneling processes into blocking states that suppress the current. Contrary to similar effects in quantum dots the spin blockade in molecular magnets is caused by a relay of blocking states. Transport fingerprints of the quantum tunneling of the magnetic moment. The quantum tunneling of the magnetic moment in clusters of single molecule magnets has been the focus of intensive experimental and theoretical research. In this thesis we show that quantum tunneling leads to unique signatures in transport experiments where single molecule magnets are trapped in three-terminal setups in the regimes of weak and strong coupling between molecule and electrode. In the weak coupling regime resonances in the conductance that do not correspond to molecular addition energies are caused by the quantum tunneling. On the one hand these &quot;fake&quot; resonances are clear fingerprints of the quantum tunneling, on the other hand they complicate the transport spectroscopy. We show that measuring the shot-noise helps to distinguish these resonances from those caused by the molecular spectrum. &quot;Fake&quot; resonances arise due to strong asymmetries in the rates and have already been discussed in quantum dots. However, the microscopic origin of the asymmetry in the rates in the latter systems is not clear in contrast to single molecule magnets: The quantum tunneling is a generic small parameter that induces asymmetric rates. Furthermore we show how the magnetic anisotropy leads to negative differential conductance and a complete current suppression. In the strong coupling limit we predict for single molecule magnets a zero-bias anomaly in the conductance, the Kondo effect. This effect is well-known from quantum dots but has not been discussed for single molecule magnets yet. Even though in these systems the spin is (nearly) fixed along an easy axis deviations from perfect axial symmetry lead to spin fluctuations that are enhanced by the coupling to the electrode. The dependence of the Kondo effect on generic molecular properties as the spin, the strength of the magnetic anisotropy and its symmetry, are analyzed in detail. We compare the results of the non-perturbative numerical renormalization group with a &quot;poor man&#x27;s scaling&quot; analysis of an effective model which gives insight in the processes leading to Kondo physics. The discussed effective model, specific for molecular magnets, is a full anisotropic Kondo model which has not been considered for quantum dots. Remarkably, under certain conditions a large half-integer molecular spin compensates the magnetic anisotropy and leads to an enhancement of the Kondo effect. Additionally, we predict a spin selection rule for the Kondo effect to occur based on the symmetry of the quantum tunneling. This selection rule is decisively different from the even-odd alternation known from quantum dots. Magnetic fields usually suppress Kondo correlations. Again single molecule magnets have extraordinary properties: The Kondo effect can be induced and suppressed several times depending on the magnitude of the molecular spin. It shows reentrant behavior as function of a longitudinal magnetic field. Hence the Kondo effect can be investigated for integer spin systems and the change of the spin by a gate voltage is no longer necessary. Furthermore we set up a correspondence of the conductance fingerprints for adjacent spin states. This allows a determination of the magnitude of the spin and the molecular anisotropies in the experiment.","abstract_has_math":true,"creators":["Romeike, Christian Jörg Rudolf"],"institution":"Publikationsserver der RWTH Aachen University","degree_name":null,"degree_level":null,"degree_discipline":null,"degree_department":null,"school":null,"contributors":["Schoeller, Herbert"],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2006,"date_issued":"2006","date_published":"2006","updated_at":"2026-07-30T19:43:02Z","subjects":["info:eu-repo/classification/ddc/530","Physik","Molecular electronics","Transport spectroscopy","Single molecule magnets"],"languages":["eng"],"rights":["info:eu-repo/semantics/openAccess"],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier","label":"Identifier","values":["https://publications.rwth-aachen.de/search?p=id:%22RWTH-CONV-122883%22"],"render_values":[{"text":"https://publications.rwth-aachen.de/search?p=id:%22RWTH-CONV-122883%22","href":"https://publications.rwth-aachen.de/search?p=id:%22RWTH-CONV-122883%22","code":true}]}]},"links":{"outbound_url":"https://publications.rwth-aachen.de/record/61204","outbound_label":"Repository record","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Schoeller, Herbert"]},{"key":"dc:creator","label":"Author","values":["Romeike, Christian Jörg Rudolf"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:coverage","label":"Dc Coverage","values":["DE"]},{"key":"dc:date","label":"Dc Date","values":["2006"]},{"key":"dc:publisher","label":"Institution","values":["Publikationsserver der RWTH Aachen University"]},{"key":"dc:relation","label":"Dc Relation","values":["info:eu-repo/semantics/altIdentifier/urn/urn:nbn:de:hbz:82-opus-16513"]},{"key":"dc:type","label":"Dc Type","values":["info:eu-repo/semantics/doctoralThesis","info:eu-repo/semantics/publishedVersion"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["info:eu-repo/classification/ddc/530","Physik","Molecular electronics","Transport spectroscopy","Single molecule magnets"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["eng"]},{"key":"dc:rights","label":"Dc Rights","values":["info:eu-repo/semantics/openAccess"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["https://publications.rwth-aachen.de/record/61204","https://publications.rwth-aachen.de/search?p=id:%22RWTH-CONV-122883%22"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["The field of molecular electronics experienced an enormous boost in both experiment and theory in the last few years. Addressing a single molecule is not only of technological interest, also fundamental physical questions arise: Are single molecules the ultimate step in the miniaturization of transistors? Are single molecules suitable for the storage of quantum information? How do tunneling electrons influence molecular magnets? Do single molecules exhibit quantum tunneling of the magnetic moment? Subject of this thesis is the theoretical description and analysis of electron transport through single molecules. Therefore transport models are developed that take into account the special magnetic, electronic and electro-chemical properties of the molecules of interest. One advantage of this approach is that model parameters can be fixed by ab-initio calculations which allows a comparison to experiments. Another advantage is that a huge class of molecules with similar properties can be described by these models. The models are studied in different transport regimes: in the regime of weak coupling between molecule and electrode a master equation approach is used which captures the non-equilibrium imposed by the applied bias voltage correctly. In the strong coupling regime and for an equilibrium situation the non-perturbative numerical renormalization group is the method of choice. In the following, the main topics addressed in this thesis are summarized. Charge induced spin blockade in grid molecules. Grid molecules incorporate transition metal ions that are held by organic ligands on the edges of a grid. The building units and the geometry of these molecules are designable in an extraordinary way: metal ions with different spin as well as ligands with different electronic properties may be used. In addition different sizes of grids can be realized. Based on the geometric and electronic structure a minimal transport model is developed. Interestingly, the Nagaoka mechanism, well-known from solid state physics, becomes effective and leads to maximal spin ground states or energetically low lying excitations for certain charge states. These states show drastic effects in transport experiments: a complete current suppression at small but finite bias voltage and negative differential conductance. Very recently performed transport experiments in the group of Herre van der Zant (Delft) show a complete current suppression in some samples. Transport experiments through a molecular magnet Transport experiments through single magnetic molecules (Mn$_{12}$) have been recently reported by the groups of Herre van der Zant (Delft) and Hongkun Park (Harvard) that show fingerprints of the magnetic anisotropy and the large spin which are generic properties of these molecules. These pioneering works point to a new direction in the study of molecular magnets: In contrast to experiments on clusters of these molecules where magnetic properties are related to single molecule properties under the assumption that the intermolecular interactions are weak, in transport experiments individual molecules can directly be addressed. Taking into account their intrinsic properties, a transport model is analyzed in this thesis that explains the key features of the Delft experiment, a compete current blockade of the order of the magnetic anisotropy barrier and negative differential conductance. Remarkably, both effects can be traced back to a cascade of electron tunneling processes into blocking states that suppress the current. Contrary to similar effects in quantum dots the spin blockade in molecular magnets is caused by a relay of blocking states. Transport fingerprints of the quantum tunneling of the magnetic moment. The quantum tunneling of the magnetic moment in clusters of single molecule magnets has been the focus of intensive experimental and theoretical research. In this thesis we show that quantum tunneling leads to unique signatures in transport experiments where single molecule magnets are trapped in three-terminal setups in the regimes of weak and strong coupling between molecule and electrode. In the weak coupling regime resonances in the conductance that do not correspond to molecular addition energies are caused by the quantum tunneling. On the one hand these \"fake\" resonances are clear fingerprints of the quantum tunneling, on the other hand they complicate the transport spectroscopy. We show that measuring the shot-noise helps to distinguish these resonances from those caused by the molecular spectrum. \"Fake\" resonances arise due to strong asymmetries in the rates and have already been discussed in quantum dots. However, the microscopic origin of the asymmetry in the rates in the latter systems is not clear in contrast to single molecule magnets: The quantum tunneling is a generic small parameter that induces asymmetric rates. Furthermore we show how the magnetic anisotropy leads to negative differential conductance and a complete current suppression. In the strong coupling limit we predict for single molecule magnets a zero-bias anomaly in the conductance, the Kondo effect. This effect is well-known from quantum dots but has not been discussed for single molecule magnets yet. Even though in these systems the spin is (nearly) fixed along an easy axis deviations from perfect axial symmetry lead to spin fluctuations that are enhanced by the coupling to the electrode. The dependence of the Kondo effect on generic molecular properties as the spin, the strength of the magnetic anisotropy and its symmetry, are analyzed in detail. We compare the results of the non-perturbative numerical renormalization group with a \"poor man's scaling\" analysis of an effective model which gives insight in the processes leading to Kondo physics. The discussed effective model, specific for molecular magnets, is a full anisotropic Kondo model which has not been considered for quantum dots. Remarkably, under certain conditions a large half-integer molecular spin compensates the magnetic anisotropy and leads to an enhancement of the Kondo effect. Additionally, we predict a spin selection rule for the Kondo effect to occur based on the symmetry of the quantum tunneling. This selection rule is decisively different from the even-odd alternation known from quantum dots. Magnetic fields usually suppress Kondo correlations. Again single molecule magnets have extraordinary properties: The Kondo effect can be induced and suppressed several times depending on the magnitude of the molecular spin. It shows reentrant behavior as function of a longitudinal magnetic field. Hence the Kondo effect can be investigated for integer spin systems and the change of the spin by a gate voltage is no longer necessary. Furthermore we set up a correspondence of the conductance fingerprints for adjacent spin states. This allows a determination of the magnitude of the spin and the molecular anisotropies in the experiment."]},{"key":"dc:source","label":"Dc Source","values":["Aachen : Publikationsserver der RWTH Aachen University XIII, 136 S. : Ill., graph. Darst. (2006). = Aachen, Techn. Hochsch., Diss., 2006"]},{"key":"dc:title","label":"Title","values":["Quantum transport through single molecules"]}]}],"canonical_facts":{"dc:contributor":["Schoeller, Herbert"],"dc:coverage":["DE"],"dc:creator":["Romeike, Christian Jörg Rudolf"],"dc:date":["2006"],"dc:description":["The field of molecular electronics experienced an enormous boost in both experiment and theory in the last few years. Addressing a single molecule is not only of technological interest, also fundamental physical questions arise: Are single molecules the ultimate step in the miniaturization of transistors? Are single molecules suitable for the storage of quantum information? How do tunneling electrons influence molecular magnets? Do single molecules exhibit quantum tunneling of the magnetic moment? Subject of this thesis is the theoretical description and analysis of electron transport through single molecules. Therefore transport models are developed that take into account the special magnetic, electronic and electro-chemical properties of the molecules of interest. One advantage of this approach is that model parameters can be fixed by ab-initio calculations which allows a comparison to experiments. Another advantage is that a huge class of molecules with similar properties can be described by these models. The models are studied in different transport regimes: in the regime of weak coupling between molecule and electrode a master equation approach is used which captures the non-equilibrium imposed by the applied bias voltage correctly. In the strong coupling regime and for an equilibrium situation the non-perturbative numerical renormalization group is the method of choice. In the following, the main topics addressed in this thesis are summarized. Charge induced spin blockade in grid molecules. Grid molecules incorporate transition metal ions that are held by organic ligands on the edges of a grid. The building units and the geometry of these molecules are designable in an extraordinary way: metal ions with different spin as well as ligands with different electronic properties may be used. In addition different sizes of grids can be realized. Based on the geometric and electronic structure a minimal transport model is developed. Interestingly, the Nagaoka mechanism, well-known from solid state physics, becomes effective and leads to maximal spin ground states or energetically low lying excitations for certain charge states. These states show drastic effects in transport experiments: a complete current suppression at small but finite bias voltage and negative differential conductance. Very recently performed transport experiments in the group of Herre van der Zant (Delft) show a complete current suppression in some samples. Transport experiments through a molecular magnet Transport experiments through single magnetic molecules (Mn$_{12}$) have been recently reported by the groups of Herre van der Zant (Delft) and Hongkun Park (Harvard) that show fingerprints of the magnetic anisotropy and the large spin which are generic properties of these molecules. These pioneering works point to a new direction in the study of molecular magnets: In contrast to experiments on clusters of these molecules where magnetic properties are related to single molecule properties under the assumption that the intermolecular interactions are weak, in transport experiments individual molecules can directly be addressed. Taking into account their intrinsic properties, a transport model is analyzed in this thesis that explains the key features of the Delft experiment, a compete current blockade of the order of the magnetic anisotropy barrier and negative differential conductance. Remarkably, both effects can be traced back to a cascade of electron tunneling processes into blocking states that suppress the current. Contrary to similar effects in quantum dots the spin blockade in molecular magnets is caused by a relay of blocking states. Transport fingerprints of the quantum tunneling of the magnetic moment. The quantum tunneling of the magnetic moment in clusters of single molecule magnets has been the focus of intensive experimental and theoretical research. In this thesis we show that quantum tunneling leads to unique signatures in transport experiments where single molecule magnets are trapped in three-terminal setups in the regimes of weak and strong coupling between molecule and electrode. In the weak coupling regime resonances in the conductance that do not correspond to molecular addition energies are caused by the quantum tunneling. On the one hand these \"fake\" resonances are clear fingerprints of the quantum tunneling, on the other hand they complicate the transport spectroscopy. We show that measuring the shot-noise helps to distinguish these resonances from those caused by the molecular spectrum. \"Fake\" resonances arise due to strong asymmetries in the rates and have already been discussed in quantum dots. However, the microscopic origin of the asymmetry in the rates in the latter systems is not clear in contrast to single molecule magnets: The quantum tunneling is a generic small parameter that induces asymmetric rates. Furthermore we show how the magnetic anisotropy leads to negative differential conductance and a complete current suppression. In the strong coupling limit we predict for single molecule magnets a zero-bias anomaly in the conductance, the Kondo effect. This effect is well-known from quantum dots but has not been discussed for single molecule magnets yet. Even though in these systems the spin is (nearly) fixed along an easy axis deviations from perfect axial symmetry lead to spin fluctuations that are enhanced by the coupling to the electrode. The dependence of the Kondo effect on generic molecular properties as the spin, the strength of the magnetic anisotropy and its symmetry, are analyzed in detail. We compare the results of the non-perturbative numerical renormalization group with a \"poor man's scaling\" analysis of an effective model which gives insight in the processes leading to Kondo physics. The discussed effective model, specific for molecular magnets, is a full anisotropic Kondo model which has not been considered for quantum dots. Remarkably, under certain conditions a large half-integer molecular spin compensates the magnetic anisotropy and leads to an enhancement of the Kondo effect. Additionally, we predict a spin selection rule for the Kondo effect to occur based on the symmetry of the quantum tunneling. This selection rule is decisively different from the even-odd alternation known from quantum dots. Magnetic fields usually suppress Kondo correlations. Again single molecule magnets have extraordinary properties: The Kondo effect can be induced and suppressed several times depending on the magnitude of the molecular spin. It shows reentrant behavior as function of a longitudinal magnetic field. Hence the Kondo effect can be investigated for integer spin systems and the change of the spin by a gate voltage is no longer necessary. Furthermore we set up a correspondence of the conductance fingerprints for adjacent spin states. This allows a determination of the magnitude of the spin and the molecular anisotropies in the experiment."],"dc:identifier":["https://publications.rwth-aachen.de/record/61204","https://publications.rwth-aachen.de/search?p=id:%22RWTH-CONV-122883%22"],"dc:language":["eng"],"dc:publisher":["Publikationsserver der RWTH Aachen University"],"dc:relation":["info:eu-repo/semantics/altIdentifier/urn/urn:nbn:de:hbz:82-opus-16513"],"dc:rights":["info:eu-repo/semantics/openAccess"],"dc:source":["Aachen : Publikationsserver der RWTH Aachen University XIII, 136 S. : Ill., graph. Darst. (2006). = Aachen, Techn. Hochsch., Diss., 2006"],"dc:subject":["info:eu-repo/classification/ddc/530","Physik","Molecular electronics","Transport spectroscopy","Single molecule magnets"],"dc:title":["Quantum transport through single molecules"],"dc:type":["info:eu-repo/semantics/doctoralThesis","info:eu-repo/semantics/publishedVersion"]},"updated_at":"2026-07-30T19:43:02Z"}