{"id":{"repo_id":"mit","oai_identifier":"oai:dspace.mit.edu:1721.1/119930"},"canonical_url":"https://search.dev.ndltd.org/etd/mit/oai:dspace.mit.edu:1721.1/119930","repository":{"repo_id":"mit","name":"MIT","base_url":"https://dspace.mit.edu/oai/request"},"display":{"title":"Novel transport regimes in graphene","abstract":"Transport phenomena in solids -- such as energy and charge flows in response to external fields -- is a subject of fundamental interest for solid state physics. Carrier transport exhibits a wide variety of intriguing and potentially useful behaviors arising due to a rich and complex interplay between electron-disorder, electron-electron, and electron-phonon interactions. Graphene, a newly discovered carbon one-atom-thick material, has unique transport characteristics, some of which are already well understood, whereas some are being under investigation or are waiting to be discovered. The two-dimensional character and exceptional cleanness of graphene, as well as gate tunability of the carrier density and electron-electron interactions, make graphene an excellent platform to study a range of new transport regimes, such as quantum-coherent ballistic transport, electron hydrodynamics and energy dissipation at the atomic scale. We will study ballistic transport in the context of electronic lensing. We will also demonstrate that electron-electron scattering alters ballistic transport in a dramatic way, giving rise to hole backflows and \"memory effects\", and leading to experimental signatures such as negative non-local resistance. Upon further increase of the electron-electron interaction strength, the system enters the hydrodynamic regime, where a host of new phenomena can emerge. We also show that the electron-disorder interactions have important implications for energy transport, with energy dissipation occurring predominantly at atomic-scale defects. In this thesis, we will provide a detailed discussion of these topics and their connection to the ongoing experiments.","abstract_html":"Transport phenomena in solids -- such as energy and charge flows in response to external fields -- is a subject of fundamental interest for solid state physics. Carrier transport exhibits a wide variety of intriguing and potentially useful behaviors arising due to a rich and complex interplay between electron-disorder, electron-electron, and electron-phonon interactions. Graphene, a newly discovered carbon one-atom-thick material, has unique transport characteristics, some of which are already well understood, whereas some are being under investigation or are waiting to be discovered. The two-dimensional character and exceptional cleanness of graphene, as well as gate tunability of the carrier density and electron-electron interactions, make graphene an excellent platform to study a range of new transport regimes, such as quantum-coherent ballistic transport, electron hydrodynamics and energy dissipation at the atomic scale. We will study ballistic transport in the context of electronic lensing. We will also demonstrate that electron-electron scattering alters ballistic transport in a dramatic way, giving rise to hole backflows and "memory effects", and leading to experimental signatures such as negative non-local resistance. Upon further increase of the electron-electron interaction strength, the system enters the hydrodynamic regime, where a host of new phenomena can emerge. We also show that the electron-disorder interactions have important implications for energy transport, with energy dissipation occurring predominantly at atomic-scale defects. In this thesis, we will provide a detailed discussion of these topics and their connection to the ongoing experiments.","abstract_has_math":false,"creators":["Kong, Jian Feng"],"institution":"Massachusetts Institute of Technology","degree_name":null,"degree_level":null,"degree_discipline":null,"degree_department":"Massachusetts Institute of Technology. Department of Physics.","school":null,"contributors":[],"advisors":["Leonid Levitov."],"committee_chairs":[],"committee_members":[],"year":2018,"date_issued":"2018","date_published":"2018","updated_at":"2026-07-22T22:21:11Z","subjects":["Physics."],"languages":["eng"],"rights":["MIT theses are protected by copyright. They may be viewed, downloaded, or printed from this source but further reproduction or distribution in any format is prohibited without written permission."],"rights_urls":["http://dspace.mit.edu/handle/1721.1/7582"],"identifier_entries":[]},"links":{"outbound_url":"http://hdl.handle.net/1721.1/119930","outbound_label":"Handle","outbound_source":"dc:identifier.uri"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor.advisor","label":"Advisor","values":["Leonid Levitov."]},{"key":"dc:contributor.department","label":"Department","values":["Massachusetts Institute of Technology. Department of Physics."]},{"key":"dc:contributor.other","label":"Dc Contributor Other","values":["Massachusetts Institute of Technology. Department of Physics."]},{"key":"dc:creator","label":"Author","values":["Kong, Jian Feng"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.accessioned","label":"Dc Date Accessioned","values":["2019-01-11T16:03:19Z"]},{"key":"dc:date.available","label":"Dc Date Available","values":["2019-01-11T16:03:19Z"]},{"key":"dc:date.issued","label":"Date","values":["2018"]},{"key":"dc:publisher","label":"Institution","values":["Massachusetts Institute of Technology"]},{"key":"dc:type","label":"Dc Type","values":["Thesis"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Physics."]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language.iso","label":"Language (ISO)","values":["eng"]},{"key":"dc:rights","label":"Dc Rights","values":["MIT theses are protected by copyright. They may be viewed, downloaded, or printed from this source but further reproduction or distribution in any format is prohibited without written permission."]},{"key":"dc:rights.uri","label":"Rights URI","values":["http://dspace.mit.edu/handle/1721.1/7582"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier.uri","label":"Identifier URI","values":["http://hdl.handle.net/1721.1/119930"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["Thesis: Ph. D., Massachusetts Institute of Technology, Department of Physics, 2018.","Cataloged from PDF version of thesis.","Includes bibliographical references (pages 121-130)."]},{"key":"dc:description.abstract","label":"Abstract","values":["Transport phenomena in solids -- such as energy and charge flows in response to external fields -- is a subject of fundamental interest for solid state physics. Carrier transport exhibits a wide variety of intriguing and potentially useful behaviors arising due to a rich and complex interplay between electron-disorder, electron-electron, and electron-phonon interactions. Graphene, a newly discovered carbon one-atom-thick material, has unique transport characteristics, some of which are already well understood, whereas some are being under investigation or are waiting to be discovered. The two-dimensional character and exceptional cleanness of graphene, as well as gate tunability of the carrier density and electron-electron interactions, make graphene an excellent platform to study a range of new transport regimes, such as quantum-coherent ballistic transport, electron hydrodynamics and energy dissipation at the atomic scale. We will study ballistic transport in the context of electronic lensing. We will also demonstrate that electron-electron scattering alters ballistic transport in a dramatic way, giving rise to hole backflows and \"memory effects\", and leading to experimental signatures such as negative non-local resistance. Upon further increase of the electron-electron interaction strength, the system enters the hydrodynamic regime, where a host of new phenomena can emerge. We also show that the electron-disorder interactions have important implications for energy transport, with energy dissipation occurring predominantly at atomic-scale defects. In this thesis, we will provide a detailed discussion of these topics and their connection to the ongoing experiments."]},{"key":"dc:description.degree","label":"Dc Description Degree","values":["Ph. D."]},{"key":"dc:title","label":"Title","values":["Novel transport regimes in graphene"]}]}],"canonical_facts":{"dc:contributor.advisor":["Leonid Levitov."],"dc:contributor.department":["Massachusetts Institute of Technology. Department of Physics."],"dc:contributor.other":["Massachusetts Institute of Technology. Department of Physics."],"dc:creator":["Kong, Jian Feng"],"dc:date.accessioned":["2019-01-11T16:03:19Z"],"dc:date.available":["2019-01-11T16:03:19Z"],"dc:date.issued":["2018"],"dc:description":["Thesis: Ph. D., Massachusetts Institute of Technology, Department of Physics, 2018.","Cataloged from PDF version of thesis.","Includes bibliographical references (pages 121-130)."],"dc:description.abstract":["Transport phenomena in solids -- such as energy and charge flows in response to external fields -- is a subject of fundamental interest for solid state physics. Carrier transport exhibits a wide variety of intriguing and potentially useful behaviors arising due to a rich and complex interplay between electron-disorder, electron-electron, and electron-phonon interactions. Graphene, a newly discovered carbon one-atom-thick material, has unique transport characteristics, some of which are already well understood, whereas some are being under investigation or are waiting to be discovered. The two-dimensional character and exceptional cleanness of graphene, as well as gate tunability of the carrier density and electron-electron interactions, make graphene an excellent platform to study a range of new transport regimes, such as quantum-coherent ballistic transport, electron hydrodynamics and energy dissipation at the atomic scale. We will study ballistic transport in the context of electronic lensing. We will also demonstrate that electron-electron scattering alters ballistic transport in a dramatic way, giving rise to hole backflows and \"memory effects\", and leading to experimental signatures such as negative non-local resistance. Upon further increase of the electron-electron interaction strength, the system enters the hydrodynamic regime, where a host of new phenomena can emerge. We also show that the electron-disorder interactions have important implications for energy transport, with energy dissipation occurring predominantly at atomic-scale defects. In this thesis, we will provide a detailed discussion of these topics and their connection to the ongoing experiments."],"dc:description.degree":["Ph. D."],"dc:identifier.uri":["http://hdl.handle.net/1721.1/119930"],"dc:language.iso":["eng"],"dc:publisher":["Massachusetts Institute of Technology"],"dc:rights":["MIT theses are protected by copyright. They may be viewed, downloaded, or printed from this source but further reproduction or distribution in any format is prohibited without written permission."],"dc:rights.uri":["http://dspace.mit.edu/handle/1721.1/7582"],"dc:subject":["Physics."],"dc:title":["Novel transport regimes in graphene"],"dc:type":["Thesis"]},"updated_at":"2026-07-22T22:21:11Z"}