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)
475 2017-09-26 11:00    Time-resolved ARPES study of Dirac and topological materials
474 2017-10-10 16:00    Discovery of New 2D Materials with Diverse Physical Properties
473 2017-11-03 14:30    Quantum Resistor-Capacitor Circuit with Majorana Edge States file
472 2017-11-03 16:00    Expedition to the Kitaev Quantum Spin Liquid: Hunting for Majorana fermions file
471 2017-11-08 13:00    “Emergent exotic quasiparticles in quantum spin liquids” file
470 2017-11-28 16:00    Physics after the lab and the desk: Your work in PRL file
469 2017-12-13 13:30    KAIST-KIAS Joint Workshop in Theoretical Sciences 개최 file
468 2017-12-14 15:00    Exploring the Universe via GWs in the era of multi-messenger astronomy
467 2017-12-15 09:20    Workshop on Magnetism in Unconventional Superconductors 개최 file
466 2018-02-12 15:00    The recent result of XMASS Experiment
465 2018-03-16 14:30    산화물 다층박막에서의 다양한 물리현상 file
464 2018-03-16 16:00    Van der Waals Heterostructures from Quantum Transport to Ultrafast Optoelectronics file
463 2018-04-06 10:00    Entanglement and thermalization in many-body systems: recent progress file
462 2018-04-09 11:00    Doublon-holon origin of the subpeaks at the Hubbard band edges file
461 2018-04-11 13:30    Probing 3D Structure and Physical Properties of Materials at the Single-Atom Level file
460 2018-04-11 16:00    Non-Gaussian states of multimode light generated via hybrid quantum information processing file
459 2018-04-13 10:00    Quantum meets Mechanics: from Quantum Information to Fundamental Research file
458 2018-05-09 16:00    Recent advances in thermoelectric bulk composites file
457 2018-05-11 14:30    Disordered Floquet topological insulators file
456 2018-05-11 16:00    암페어 단위 재정의와 단전자 펌프 소자 개발 file