{"id":{"repo_id":"mit","oai_identifier":"oai:dspace.mit.edu:1721.1/139372"},"canonical_url":"https://search.dev.ndltd.org/etd/mit/oai:dspace.mit.edu:1721.1/139372","repository":{"repo_id":"mit","name":"MIT","base_url":"https://dspace.mit.edu/oai/request"},"display":{"title":"Phase-Coherent Drag of Plasmons in a 2D Flowing Fermi Liquid","abstract":"Collective modes in electron fluids feature phase-coherent drag response under a background carrier flow, resembling the optical Fizeau drag of photons by a moving medium. Time reversal breaking due to Fermi surface polarization by the flow results in nonreciprocity: collective modes acquire a ±𝑘 asymmetry in mode dispersion. This thesis explores plasmonic drag in two-dimensional electron fluids with a full account given to the Fermi-liquid interactions. These interactions are essential when the electron band is nonparabolic, as in graphene, giving rise to subtle “motional” Fermi-liquid effects which describe the flow-induced change in the quasiparticle velocities and interactions. These new Fermi-liquid effects can be represented as the flow-dependent interactions between quasiparticles on the Fermi surface deformed by the flow, in general not reducible to the standard Fermi-liquid parameters. A model of graphene Fermi-liquid predicts a substantial enhancement in the plasmon frequency shift, pointing to an opportunity to directly probe the motional Fermi-liquid effects in plasmonic near-field imaging experiments.","abstract_html":"Collective modes in electron fluids feature phase-coherent drag response under a background carrier flow, resembling the optical Fizeau drag of photons by a moving medium. Time reversal breaking due to Fermi surface polarization by the flow results in nonreciprocity: collective modes acquire a ±𝑘 asymmetry in mode dispersion. This thesis explores plasmonic drag in two-dimensional electron fluids with a full account given to the Fermi-liquid interactions. These interactions are essential when the electron band is nonparabolic, as in graphene, giving rise to subtle “motional” Fermi-liquid effects which describe the flow-induced change in the quasiparticle velocities and interactions. These new Fermi-liquid effects can be represented as the flow-dependent interactions between quasiparticles on the Fermi surface deformed by the flow, in general not reducible to the standard Fermi-liquid parameters. A model of graphene Fermi-liquid predicts a substantial enhancement in the plasmon frequency shift, pointing to an opportunity to directly probe the motional Fermi-liquid effects in plasmonic near-field imaging experiments.","abstract_has_math":false,"creators":["Gao, Haoyang"],"institution":"Massachusetts Institute of Technology","degree_name":"Bachelor","degree_level":null,"degree_discipline":null,"degree_department":"Massachusetts Institute of Technology. Department of Physics","school":null,"contributors":[],"advisors":["Levitov, Leonid S."],"committee_chairs":[],"committee_members":[],"year":2021,"date_issued":"2021-06","date_published":"2021-06","updated_at":"2026-07-22T22:21:26Z","subjects":[],"languages":[],"rights":["In Copyright - Educational Use Permitted","Copyright retained by author(s)"],"rights_urls":["https://rightsstatements.org/page/InC-EDU/1.0/"],"identifier_entries":[]},"links":{"outbound_url":"https://hdl.handle.net/1721.1/139372","outbound_label":"Handle","outbound_source":"dc:identifier.uri"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor.advisor","label":"Advisor","values":["Levitov, Leonid S."]},{"key":"dc:contributor.department","label":"Department","values":["Massachusetts Institute of Technology. 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Time reversal breaking due to Fermi surface polarization by the flow results in nonreciprocity: collective modes acquire a ±𝑘 asymmetry in mode dispersion. This thesis explores plasmonic drag in two-dimensional electron fluids with a full account given to the Fermi-liquid interactions. These interactions are essential when the electron band is nonparabolic, as in graphene, giving rise to subtle “motional” Fermi-liquid effects which describe the flow-induced change in the quasiparticle velocities and interactions. These new Fermi-liquid effects can be represented as the flow-dependent interactions between quasiparticles on the Fermi surface deformed by the flow, in general not reducible to the standard Fermi-liquid parameters. A model of graphene Fermi-liquid predicts a substantial enhancement in the plasmon frequency shift, pointing to an opportunity to directly probe the motional Fermi-liquid effects in plasmonic near-field imaging experiments."]},{"key":"dc:description.degree","label":"Dc Description Degree","values":["S.B."]},{"key":"dc:title","label":"Title","values":["Phase-Coherent Drag of Plasmons in a 2D Flowing Fermi Liquid"]}]}],"canonical_facts":{"dc:contributor.advisor":["Levitov, Leonid S."],"dc:contributor.department":["Massachusetts Institute of Technology. Department of Physics"],"dc:creator":["Gao, Haoyang"],"dc:date.accessioned":["2022-01-14T15:07:41Z"],"dc:date.available":["2022-01-14T15:07:41Z"],"dc:date.issued":["2021-06"],"dc:description.abstract":["Collective modes in electron fluids feature phase-coherent drag response under a background carrier flow, resembling the optical Fizeau drag of photons by a moving medium. Time reversal breaking due to Fermi surface polarization by the flow results in nonreciprocity: collective modes acquire a ±𝑘 asymmetry in mode dispersion. This thesis explores plasmonic drag in two-dimensional electron fluids with a full account given to the Fermi-liquid interactions. These interactions are essential when the electron band is nonparabolic, as in graphene, giving rise to subtle “motional” Fermi-liquid effects which describe the flow-induced change in the quasiparticle velocities and interactions. These new Fermi-liquid effects can be represented as the flow-dependent interactions between quasiparticles on the Fermi surface deformed by the flow, in general not reducible to the standard Fermi-liquid parameters. A model of graphene Fermi-liquid predicts a substantial enhancement in the plasmon frequency shift, pointing to an opportunity to directly probe the motional Fermi-liquid effects in plasmonic near-field imaging experiments."],"dc:description.degree":["S.B."],"dc:identifier.uri":["https://hdl.handle.net/1721.1/139372"],"dc:publisher":["Massachusetts Institute of Technology"],"dc:rights":["In Copyright - Educational Use Permitted","Copyright retained by author(s)"],"dc:rights.uri":["https://rightsstatements.org/page/InC-EDU/1.0/"],"dc:title":["Phase-Coherent Drag of Plasmons in a 2D Flowing Fermi Liquid"],"dc:type":["Thesis"],"thesis:degree_name":["Bachelor","Bachelor of Science in Physics"]},"updated_at":"2026-07-22T22:21:26Z"}