{"id":{"repo_id":"mit","oai_identifier":"oai:dspace.mit.edu:1721.1/158272"},"canonical_url":"https://search.dev.ndltd.org/etd/mit/oai:dspace.mit.edu:1721.1/158272","repository":{"repo_id":"mit","name":"MIT","base_url":"https://dspace.mit.edu/oai/request"},"display":{"title":"Light-induced States and Phase Transitions in Quantum Materials investigated by Photoemission Spectroscopy and Epitaxial Synthesis","abstract":"In condensed matter physics, a field of the study on phases of matter and their transitions, light-induced states and phase transitions have attracted significant attention due to their importance in both fundamental research and applications. This thesis will specifically delve into three compelling studies: (1) Floquet-Bloch states, photon-dressed Bloch states, were investigated in graphene. These states are generated by a time-periodic potential of light, closely related to the topic of Floquet engineering. (2) A light-induced insulator-to-metal transition was observed in Sr₂IrO₄, providing valuable insights into the fundamental characteristics of its ground states. (3) A light-induced topological phase transition (from a Z₂ topological insulator to a trivial insulator) was investigated in Bi-doped (Pb,Sn)Se thin-films. For these studies, we employed time- and angle-resolved photoemission spectroscopy (trARPES) and molecular beam epitaxy (MBE). Through in-depth investigation into these phenomena, this thesis seeks to contribute to the broader understanding of light-matter interactions in quantum materials.","abstract_html":"In condensed matter physics, a field of the study on phases of matter and their transitions, light-induced states and phase transitions have attracted significant attention due to their importance in both fundamental research and applications. This thesis will specifically delve into three compelling studies: (1) Floquet-Bloch states, photon-dressed Bloch states, were investigated in graphene. These states are generated by a time-periodic potential of light, closely related to the topic of Floquet engineering. (2) A light-induced insulator-to-metal transition was observed in Sr₂IrO₄, providing valuable insights into the fundamental characteristics of its ground states. (3) A light-induced topological phase transition (from a Z₂ topological insulator to a trivial insulator) was investigated in Bi-doped (Pb,Sn)Se thin-films. For these studies, we employed time- and angle-resolved photoemission spectroscopy (trARPES) and molecular beam epitaxy (MBE). Through in-depth investigation into these phenomena, this thesis seeks to contribute to the broader understanding of light-matter interactions in quantum materials.","abstract_has_math":false,"creators":["Choi, Dongsung"],"institution":"Massachusetts Institute of Technology","degree_name":"Doctoral","degree_level":null,"degree_discipline":null,"degree_department":"Massachusetts Institute of Technology. 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This thesis will specifically delve into three compelling studies: (1) Floquet-Bloch states, photon-dressed Bloch states, were investigated in graphene. These states are generated by a time-periodic potential of light, closely related to the topic of Floquet engineering. (2) A light-induced insulator-to-metal transition was observed in Sr₂IrO₄, providing valuable insights into the fundamental characteristics of its ground states. (3) A light-induced topological phase transition (from a Z₂ topological insulator to a trivial insulator) was investigated in Bi-doped (Pb,Sn)Se thin-films. For these studies, we employed time- and angle-resolved photoemission spectroscopy (trARPES) and molecular beam epitaxy (MBE). Through in-depth investigation into these phenomena, this thesis seeks to contribute to the broader understanding of light-matter interactions in quantum materials."]},{"key":"dc:description.degree","label":"Dc Description Degree","values":["Ph.D."]},{"key":"dc:title","label":"Title","values":["Light-induced States and Phase Transitions in Quantum Materials investigated by Photoemission Spectroscopy and Epitaxial Synthesis"]}]}],"canonical_facts":{"dc:contributor.advisor":["Gedik, Nuh"],"dc:contributor.department":["Massachusetts Institute of Technology. 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(3) A light-induced topological phase transition (from a Z₂ topological insulator to a trivial insulator) was investigated in Bi-doped (Pb,Sn)Se thin-films. For these studies, we employed time- and angle-resolved photoemission spectroscopy (trARPES) and molecular beam epitaxy (MBE). Through in-depth investigation into these phenomena, this thesis seeks to contribute to the broader understanding of light-matter interactions in quantum materials."],"dc:description.degree":["Ph.D."],"dc:identifier.uri":["https://hdl.handle.net/1721.1/158272"],"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":["Light-induced States and Phase Transitions in Quantum Materials investigated by Photoemission Spectroscopy and Epitaxial Synthesis"],"dc:type":["Thesis"],"thesis:degree_name":["Doctoral","Doctor of Philosophy"]},"updated_at":"2026-07-22T22:22:21Z"}