Speaker
Chennan Wang
(Universität Freiburg)
Description
The question of time-reversal symmetry breaking in CsV3Sb5 remains an open and debated topic, with no definitive consensus established to date. Conventional magnetic field-sensitive probes have not conclusively confirmed the presence of time-reversal symmetry-breaking fields. This presentation will provide new insights into this crucial aspect through a study into the optical coherent phonon modes. The observed conventionally symmetrical modes exhibit a pronounced unconventional contrast to the helicity of the circularly polarized light. I will discuss the underlying origins of this observed phenomenon and delineate its implications concerning the potential breaking of time-reversal symmetry in this material.
Author
Chennan Wang
(Universität Freiburg)
Co-authors
Yuhang Zhang
(Beijing National Center for Condensed Matter Physics and Institute of Physics,Chinese Academy of Sciences, Beijing 100190, China)
Andrea Capa Salinas
(Materials Department and California Nanosystems Institute, University of California Santa Barbara,Santa Barbara, California 93106, USA)
Hiroki Ueda
(PSI - Paul Scherrer Institut)
Flavio Giorgianni
Frederic Chassot
(Universite de Fribourg)
Zhen Zhao
(Beijing National Center for Condensed Matter Physics and Institute of Physics,Chinese Academy of Sciences, Beijing 100190, China)
Zhouyouwei Lu
(Beijing National Center for Condensed Matter Physics and Institute of Physics,Chinese Academy of Sciences, Beijing 100190, China)
Hui Chen
(Beijing National Center for Condensed Matter Physics and Institute of Physics,Chinese Academy of Sciences, Beijing 100190, China)
Haitao Yang
(Beijing National Center for Condensed Matter Physics and Institute of Physics,Chinese Academy of Sciences, Beijing 100190, China)
Xiaoli Dong
(Beijing National Center for Condensed Matter Physics and Institute of Physics,Chinese Academy of Sciences, Beijing 100190, China)
Ziqiang Wang
(Department of Physics, Boston College,Chestnut Hill, Massachusetts 02467, USA)
Stephen Wilson
(Materials Department and California Nanosystems Institute, University of California Santa Barbara,Santa Barbara, California 93106, USA)
Hongjun Gao
(Beijing National Center for Condensed Matter Physics and Institute of Physics,Chinese Academy of Sciences, Beijing 100190, China)
Claude Monney
(University of Fribourg)
