{"id":{"repo_id":"lsu-thes","oai_identifier":"oai:repository.lsu.edu:gradschool_dissertations-1954"},"canonical_url":"https://search.dev.ndltd.org/etd/lsu-thes/oai:repository.lsu.edu:gradschool_dissertations-1954","repository":{"repo_id":"lsu-thes","name":"Lousiana State University","base_url":"https://repository.lsu.edu/do/oai/"},"display":{"title":"Ferromagnetism and transport in diluted magnetic semiconductors","abstract":"This dissertation focuses on the study of ferromagnetism in Dilute Magnetic Semiconductors. To study these strongly correlated electronic systems, two non- perturbative techniques are used: the Dynamical Mean Field Approximation (DMFA) and the Dynamical Cluster Approximation (DCA). The model used for Dilute Magnetic Semiconductors (DMS) incorporates the strong spin-orbit couplings of the carrier holes as found in most III-V semiconductors doped with manganese such as Ga<sub>1-x</sub>Mn<sub>x</sub>As. Calculated within the DMFA, the spin-orbit coupling effects give rise to various interesting physics, primarily the anisotropic behavior of the impurity band that affect the charge transport properties in the ferromagnetic phase. We show that non-local correlations, within the DCA, are responsible for magnetic frustration and magnetic reorientation of the DMS. The DMFA is employed to study ferromagnetism and transport in Ga<sub>1-x</sub>Mn<sub>x</sub>As, using the sp<sup>3</sup> tight-binding Hamiltonian. Finally, employing the sp<sup>3</sup> tight-binding Hamiltonian and the DMFA, ferromagnetism in a wide band gap Ga<sub>1-x</sub>Mn<sub>x</sub>N is studied.","abstract_html":"This dissertation focuses on the study of ferromagnetism in Dilute Magnetic Semiconductors. To study these strongly correlated electronic systems, two non- perturbative techniques are used: the Dynamical Mean Field Approximation (DMFA) and the Dynamical Cluster Approximation (DCA). The model used for Dilute Magnetic Semiconductors (DMS) incorporates the strong spin-orbit couplings of the carrier holes as found in most III-V semiconductors doped with manganese such as Ga&lt;sub&gt;1-x&lt;/sub&gt;Mn&lt;sub&gt;x&lt;/sub&gt;As. Calculated within the DMFA, the spin-orbit coupling effects give rise to various interesting physics, primarily the anisotropic behavior of the impurity band that affect the charge transport properties in the ferromagnetic phase. We show that non-local correlations, within the DCA, are responsible for magnetic frustration and magnetic reorientation of the DMS. The DMFA is employed to study ferromagnetism and transport in Ga&lt;sub&gt;1-x&lt;/sub&gt;Mn&lt;sub&gt;x&lt;/sub&gt;As, using the sp&lt;sup&gt;3&lt;/sup&gt; tight-binding Hamiltonian. Finally, employing the sp&lt;sup&gt;3&lt;/sup&gt; tight-binding Hamiltonian and the DMFA, ferromagnetism in a wide band gap Ga&lt;sub&gt;1-x&lt;/sub&gt;Mn&lt;sub&gt;x&lt;/sub&gt;N is studied.","abstract_has_math":false,"creators":["Nili, Abdolmadjid"],"institution":"Physics and Astronomy","degree_name":"Doctor of Philosophy (PhD)","degree_level":"Dissertation","degree_discipline":"Physical Sciences and Mathematics","degree_department":null,"school":null,"contributors":[],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2010,"date_issued":"2010-01-01T08:00:00Z","date_published":"2010-01-01T08:00:00Z","updated_at":"2026-07-24T02:58:40Z","subjects":["Magnetic Semiconductors","Dynamical Mean Field Approximation","Dynamical Cluster Approximation"],"languages":[],"rights":["unrestricted","Release the entire work immediately for access worldwide."],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier","label":"Identifier","values":["etd-07072010-160348","https://repository.lsu.edu/gradschool_dissertations/955"],"render_values":[{"text":"etd-07072010-160348","href":null,"code":true},{"text":"https://repository.lsu.edu/gradschool_dissertations/955","href":"https://repository.lsu.edu/gradschool_dissertations/955","code":true}]}]},"links":{"outbound_url":"https://doi.org/10.31390/gradschool_dissertations.955","outbound_label":"DOI","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:creator","label":"Author","values":["Nili, Abdolmadjid"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2010-06-25"]},{"key":"dc:date.available","label":"Dc Date Available","values":["2022-05-12T23:10:33Z"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Physical Sciences and Mathematics"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Dissertation"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Doctor of Philosophy (PhD)"]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["Physics and Astronomy"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Magnetic Semiconductors","Dynamical Mean Field Approximation","Dynamical Cluster Approximation"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:rights","label":"Dc Rights","values":["unrestricted","Release the entire work immediately for access worldwide."]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["etd-07072010-160348","10.31390/gradschool_dissertations.955","https://repository.lsu.edu/gradschool_dissertations/955"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["This dissertation focuses on the study of ferromagnetism in Dilute Magnetic Semiconductors. To study these strongly correlated electronic systems, two non- perturbative techniques are used: the Dynamical Mean Field Approximation (DMFA) and the Dynamical Cluster Approximation (DCA). The model used for Dilute Magnetic Semiconductors (DMS) incorporates the strong spin-orbit couplings of the carrier holes as found in most III-V semiconductors doped with manganese such as Ga<sub>1-x</sub>Mn<sub>x</sub>As. Calculated within the DMFA, the spin-orbit coupling effects give rise to various interesting physics, primarily the anisotropic behavior of the impurity band that affect the charge transport properties in the ferromagnetic phase. We show that non-local correlations, within the DCA, are responsible for magnetic frustration and magnetic reorientation of the DMS. The DMFA is employed to study ferromagnetism and transport in Ga<sub>1-x</sub>Mn<sub>x</sub>As, using the sp<sup>3</sup> tight-binding Hamiltonian. Finally, employing the sp<sup>3</sup> tight-binding Hamiltonian and the DMFA, ferromagnetism in a wide band gap Ga<sub>1-x</sub>Mn<sub>x</sub>N is studied."]},{"key":"dc:title","label":"Title","values":["Ferromagnetism and transport in diluted magnetic semiconductors"]}]}],"canonical_facts":{"dc:creator":["Nili, Abdolmadjid"],"dc:date":["2010-06-25"],"dc:date.available":["2022-05-12T23:10:33Z"],"dc:description.abstract":["This dissertation focuses on the study of ferromagnetism in Dilute Magnetic Semiconductors. To study these strongly correlated electronic systems, two non- perturbative techniques are used: the Dynamical Mean Field Approximation (DMFA) and the Dynamical Cluster Approximation (DCA). The model used for Dilute Magnetic Semiconductors (DMS) incorporates the strong spin-orbit couplings of the carrier holes as found in most III-V semiconductors doped with manganese such as Ga<sub>1-x</sub>Mn<sub>x</sub>As. Calculated within the DMFA, the spin-orbit coupling effects give rise to various interesting physics, primarily the anisotropic behavior of the impurity band that affect the charge transport properties in the ferromagnetic phase. We show that non-local correlations, within the DCA, are responsible for magnetic frustration and magnetic reorientation of the DMS. The DMFA is employed to study ferromagnetism and transport in Ga<sub>1-x</sub>Mn<sub>x</sub>As, using the sp<sup>3</sup> tight-binding Hamiltonian. Finally, employing the sp<sup>3</sup> tight-binding Hamiltonian and the DMFA, ferromagnetism in a wide band gap Ga<sub>1-x</sub>Mn<sub>x</sub>N is studied."],"dc:identifier":["etd-07072010-160348","10.31390/gradschool_dissertations.955","https://repository.lsu.edu/gradschool_dissertations/955"],"dc:rights":["unrestricted","Release the entire work immediately for access worldwide."],"dc:subject":["Magnetic Semiconductors","Dynamical Mean Field Approximation","Dynamical Cluster Approximation"],"dc:title":["Ferromagnetism and transport in diluted magnetic semiconductors"],"thesis:degree_discipline":["Physical Sciences and Mathematics"],"thesis:degree_level":["Dissertation"],"thesis:degree_name":["Doctor of Philosophy (PhD)"],"thesis:institution_name":["Physics and Astronomy"]},"updated_at":"2026-07-24T02:58:40Z"}