visual
visual

세미나

  • HOME
  • >
  • 소식
  • >
  • 세미나
날짜 2016-10-07 13:30 
연사  
장소 E6-2. #1323(1st fl.) 

“Symmetry and topology in transition metal dichalcogenide?”

 

Oct. 07 (Fri), 1:30 PM, E6-2. #1323(1st fl.)
Dr. Suk Bum Chung, IBS-CCES , Seoul National University

 

For the quantum well in an optical microcavity, the interplay of the Coulomb interaction and the electron-photon coupling can lead to the emergence of bosonic quasiparticles consisting of the exciton and the cavity photon known as polariton, which can form the Bose-Einstein condensate above a threshold density. Additional physics comes into play when the quantum well consists of the transition metal dichalcogenide (TMD). The TMD band structure in the low energy spectrum has two valley components with nontrivial Berry phase, which gives rise to a selection rule in the polariton coupling, e.g. the exciton from one (the other) valley can couple only to the clockwise (counter-clockwise) polarized photon. We find that, due to this nontrivial Berry phase, our polariton condensate spontaneously breaks the rotational symmetry and hence may be regarded as a phase of matter. We also investigate how the topology of the TMD polariton condensate is related the exciton symmetry.


Contact: MyungJoon Han, Physics Dept., (mj.han@kaist.ac.kr)

 

번호 날짜 연사 제목
공지 2025-02-24 16:00    2025년 봄학기 콜로키움 안내
공지 2025-02-27 16:00    2025년 봄 물리학과 특별세미나 (광학/응집물리 분야)
365 2023-06-08 16:00    Thermal decoupling in high-Tc cuprate superconductors
364 2019-05-31 11:00    Cavity QED with Spin Qubits file
363 2022-05-27 11:00    Current Status and Future Plans of ADMX file
362 2015-07-23 13:30    Enhanced ZnO based UV photonics and related applications file
361 2020-10-15 16:00    Graphene-based Josephson junction microwave bolometer file
360 2022-06-03 11:00    (응집물리 세미나) Theoretical Investigation of Exotic Quantum States in Low-dimensional Materials
359 2025-06-26 16:00  Prof. Eun-Ah Kim (Cornell)  Attention to Quantum Complexity file
358 2023-03-27 15:00    A coherent mechanical oscillator pumped by a suspended quantum dot file
357 2022-09-21 16:00    Materials and Device Nanofabrication of Optical Metasurfaces file
356 2023-11-01 16:00    [High Energy Theory Seminar] Modular functions and 3D N=4 rank-zero superconformal field theories
355 2019-02-21 16:00    B-meson charged current anomalies - Theoretical status file
354 2023-03-30 16:00    Detecting axions with chiral magnetic effects file
353 2019-09-18 16:00    Fall 2019: Physics Seminar Serises file
352 2016-03-07 16:00    Physics Colloquium : 2016 Spring file
351 2023-11-15 16:00    Quantum hydrodynamic theory for plasmonics: from molecule-coupling to nonlinear optics
350 2022-10-04 16:00    Distinguishing 6d (1, 0) SCFTs
349 2015-03-04 12:00    Bioimaging and Biosensing Using Near-Infrared Fluorescence file
348 2019-05-03 11:00    Exotic Magnetism file
347 2014-12-22 14:00    Dynamics of molecular motors: Power stroke vs Brownian ratchet file
346 2019-05-30 16:00    Tuning the excitonic properties of semiconductors with light-matter interactions file