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)
585 2025-03-24 16:00  전응진 박사 (KIAS)  After the Higgs discovery file
584 2017-12-13 13:30    KAIST-KIAS Joint Workshop in Theoretical Sciences 개최 file
583 2019-05-21 16:00    Classification of flat bands according to the band-crossing singularity of Bloch wave functions file
582 2019-09-02 16:00    Fall 2019: Physics Colloquium file
581 2023-05-26 11:00    (응집물리 세미나)Spectral Analyses of Stochastic Charge Trapping in Oxide Heterostructures file
580 2023-05-19 11:00    (응집물리 세미나)Dipole condensations in Tilted Bose-Hubbard Chains
579 2015-10-14 18:00    인터스텔라 영화 속의 물리 file
578 2022-03-28 16:00    Ultimate-density atomic semiconductor via flat bands
577 2009-09-07 16:00    Physics Colloquium : 2009 Fall file
576 2018-11-08 16:00    Conformality lost file
575 2017-03-06 16:00    Spring 2017: Physics Colloquium file
574 2014-05-28 17:00    부품소재산업이 미래다
573 2022-11-25 11:00    [Update 세미나영상](응집물리 세미나) DMFT+ NRG: From models to real materials, from local to nonlocal correlations file
572 2022-03-21 16:00    Multi-wavelength Studies on Relativistic Jets from Gamma-ray Bright Active Galactic Nuclei
571 2023-03-16 16:00    (광학분야 세미나) Investigation of 3D cell mechanics using refractive-index tomography
570 2024-10-17 16:00    Photonic Methods for Quantum Levitodynamics Beyond the Rayleigh Regime
569 2018-08-01 11:00    Future of AI: Is the brain a computer? file
568 2022-09-23 11:00    [Update 세미나 영상] (응집물리 세미나) Steady Floquet-Andreev states in graphene Josephson junctions file
567 2020-09-11 14:00    SRC Seminar file
566 2025-04-03 16:00  윤홍 박사 (Corning Technology Center Korea)  Introduction of Corning Glass Innovation file