{"id":{"repo_id":"buffalo","oai_identifier":"oai:ubir.buffalo.edu:10477/86696"},"canonical_url":"https://search.dev.ndltd.org/etd/buffalo/oai:ubir.buffalo.edu:10477/86696","repository":{"repo_id":"buffalo","name":"Buffalo","base_url":"https://ubir.buffalo.edu/oai/request"},"display":{"title":"Symmetry Breaking in Cuprate High Tc Superconductors: Doping, Energy, and Temperature Dependence","abstract":"Ph.D.","abstract_html":"Ph.D.","abstract_has_math":false,"creators":["Seo, Jungryeol; 0000-0002-3612-7252"],"institution":"State University of New York at Buffalo","degree_name":null,"degree_level":null,"degree_discipline":null,"degree_department":null,"school":null,"contributors":["Cerne, John","Physics"],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2025,"date_issued":"2025-02-21T21:36:35Z","date_published":"2025-02-21T21:36:35Z","updated_at":"2026-07-27T19:05:34Z","subjects":["physics","condensed matter physics","low temperature physics"],"languages":["eng"],"rights":["Users of works found in University at Buffalo Institutional Repository (UBIR) are responsible for identifying and contacting the copyright owner for permission to reuse. University at Buffalo Libraries do not manage rights for copyright-protected works and cannot assist with permissions.","Copyright retained by author."],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"http://hdl.handle.net/10477/86696","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Cerne, John","Physics"]},{"key":"dc:creator","label":"Author","values":["Seo, Jungryeol; 0000-0002-3612-7252"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2025-02-21T21:36:35Z","2020"]},{"key":"dc:publisher","label":"Institution","values":["State University of New York at Buffalo"]},{"key":"dc:type","label":"Dc Type","values":["Text","Dissertation"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["physics","condensed matter physics","low temperature physics"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["eng"]},{"key":"dc:rights","label":"Dc Rights","values":["Users of works found in University at Buffalo Institutional Repository (UBIR) are responsible for identifying and contacting the copyright owner for permission to reuse. University at Buffalo Libraries do not manage rights for copyright-protected works and cannot assist with permissions.","Copyright retained by author."]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["http://hdl.handle.net/10477/86696"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["Ph.D.","We explore broken symmetries in cuprate high-temperature superconductors (HTS) by measuring changes in the polarization of transmitted light as a function of sample orientation. Earlier studies using THz [1] and near-infrared [2] polarization-sensitive measurements have discovered symmetry breaking in cuprate HTS. In two cuprate HTS, YBa2Cu3O7-x (YBCO) and La1-xSrxCuO4 (LSCO), we have found linear dichroism (LD), where the linear polarization of the probing radiation is preferentially absorbed along one direction. We have probed the LD signal in a wide range of dopings, from terahertz (THz) to mid-infrared to visible wavelengths, and at room temperature and down to 30 K. The LD signal is largest in underdoped films and there is a clear peak in the LD signal at around 400 meV in underdoped samples. In most samples, the LD signal increases as the samples are cooled, but for an overdoped YBCO film the LD signal decreases with cooling. The observations suggest that there is linear symmetry breaking that could be related to the pseudogap phase in underdoped samples. These results will provide the opportunity to study the broken symmetry in cuprate HTS in wide energy, temperature, and doping ranges and to test theoretical models of the symmetry breaking, which will likely provide new insights into the enigmatic behavior of cuprate HTS.","**To request an accessible version of the file(s) associated with this item, contact library@buffalo.edu. Please include the item's persistent URL [http://hdl.handle.net/. . .] in your request.**"]},{"key":"dc:format","label":"Dc Format","values":["application/pdf"]},{"key":"dc:title","label":"Title","values":["Symmetry Breaking in Cuprate High Tc Superconductors: Doping, Energy, and Temperature Dependence"]}]}],"canonical_facts":{"dc:contributor":["Cerne, John","Physics"],"dc:creator":["Seo, Jungryeol; 0000-0002-3612-7252"],"dc:date":["2025-02-21T21:36:35Z","2020"],"dc:description":["Ph.D.","We explore broken symmetries in cuprate high-temperature superconductors (HTS) by measuring changes in the polarization of transmitted light as a function of sample orientation. Earlier studies using THz [1] and near-infrared [2] polarization-sensitive measurements have discovered symmetry breaking in cuprate HTS. In two cuprate HTS, YBa2Cu3O7-x (YBCO) and La1-xSrxCuO4 (LSCO), we have found linear dichroism (LD), where the linear polarization of the probing radiation is preferentially absorbed along one direction. We have probed the LD signal in a wide range of dopings, from terahertz (THz) to mid-infrared to visible wavelengths, and at room temperature and down to 30 K. The LD signal is largest in underdoped films and there is a clear peak in the LD signal at around 400 meV in underdoped samples. In most samples, the LD signal increases as the samples are cooled, but for an overdoped YBCO film the LD signal decreases with cooling. The observations suggest that there is linear symmetry breaking that could be related to the pseudogap phase in underdoped samples. These results will provide the opportunity to study the broken symmetry in cuprate HTS in wide energy, temperature, and doping ranges and to test theoretical models of the symmetry breaking, which will likely provide new insights into the enigmatic behavior of cuprate HTS.","**To request an accessible version of the file(s) associated with this item, contact library@buffalo.edu. Please include the item's persistent URL [http://hdl.handle.net/. . .] in your request.**"],"dc:format":["application/pdf"],"dc:identifier":["http://hdl.handle.net/10477/86696"],"dc:language":["eng"],"dc:publisher":["State University of New York at Buffalo"],"dc:rights":["Users of works found in University at Buffalo Institutional Repository (UBIR) are responsible for identifying and contacting the copyright owner for permission to reuse. University at Buffalo Libraries do not manage rights for copyright-protected works and cannot assist with permissions.","Copyright retained by author."],"dc:subject":["physics","condensed matter physics","low temperature physics"],"dc:title":["Symmetry Breaking in Cuprate High Tc Superconductors: Doping, Energy, and Temperature Dependence"],"dc:type":["Text","Dissertation"]},"updated_at":"2026-07-27T19:05:34Z"}