visual
visual

세미나

  • HOME
  • >
  • 소식
  • >
  • 세미나
날짜 2016-10-07 13:30 
일시 Oct. 07 (Fri), 1:30 PM 
장소 E6-2. #1323(1st fl.) 
연사 Dr. Suk Bum Chung, IBS-CCES , Seoul National University 

“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 장소 제목
527 2010-02-14 16:00  E6, 1501  Physics Colloquium - 2011 Spring file
526 2023-04-14 12:00  E6-2 #1323  (응집물리 세미나)Exotic quantum phenomena in two-dimensional materials file
525 2023-05-12 11:00  E6-2 #1323  (응집물리 세미나)Interlayer conductivity and plasmon in weakly coupled layered systems
524 2022-05-26 16:00  E6 1323  (광학분야 특별세미나)Topological photonic devices
523 2023-06-01 16:00  E6-2 #1323  (광학분야 세미나)Quantum sensing using a squeezed light from hot Rb vapor
522 2015-03-09 16:00  E6, 1501  Physics Colloquium : 2015 Spring file
521 2022-03-31 16:00  online  (광학분야 특별세미나)Ultrafast time-resolved spectroscopy in topological materials
520 2023-03-30 16:00  E6-2 #1323  (광학분야 세미나)Scalable quantum entanglement in trapped-ions based quantum computer
519 2022-08-17 11:00  E6-6 #118호  Robust Hamiltonian Engineering of Large Quantum Systems (큰 양자시스템의 견고한 해밀토니안 엔지니어링)
518 2010-02-08 16:00  E6, 1501  Physics Ciolloquium : 2010 Spring file
517 2009-10-21 16:00  E6, 1501  Interdimensional Universality of Dynamic Interfaces
516 2010-09-06 16:00  E6, 1501  Physics Colloquium : 2010 Fall file
515 2017-03-21 16:00  Seminar Room 1323  Spring 2017: Physics Seminar Serises file
514 2022-05-16 16:00  E6, #1501  Design synthetic topological matter with atoms and lights
513 2020-10-15 16:00  (https://kaist.zoom.us/j/93997220310)  Towards resource-efficient and fault-tolerant quantum computation with nonclassical light
512 2022-04-25 16:00  E6, #1501  Ultrafast electron beam, a tool to explore the nanoscopic world of materials(우리말강의)
511 2017-12-13 13:30  자연과학동 대형강의실 (1501호)  KAIST-KIAS Joint Workshop in Theoretical Sciences 개최 file
510 2019-05-21 16:00  #5318, E6-2  Classification of flat bands according to the band-crossing singularity of Bloch wave functions file
509 2019-09-02 16:00  Seminar Room 1501  Fall 2019: Physics Colloquium file
508 2023-05-26 11:00  E6-2 #1323  (응집물리 세미나)Spectral Analyses of Stochastic Charge Trapping in Oxide Heterostructures file