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
425 2016-04-12 16:00  E6-2. 1st fl. #1323  Confinement of Superconducting Vortices in Magnetic Force Microscopy
424 2017-04-28 14:30  E6-2. 1st fl. #1323  Hot electron generation at surfaces and its impact to catalysis and renewable energy conversion
423 2015-12-11 15:45  E6-2, #1323  Dynamical mean field theory studies on heavy fermion system
422 2023-10-19 11:00  E6-2 #1322  Emergent functionalities of iridium oxide films with different growth orientation file
421 2023-06-26 11:00  E6, Rm#1323  Quantum computing on magnetic racetracks with flying domain wall qubits
420 2019-04-19 11:00  #1323, E6-2  First-principles studies of semiconductors for solar cell applications file
419 2021-06-11 14:30  Online seminar  Engineering sound waves and vibrations in multi-mode nanomechanical systems file
418 2019-09-27 16:00  E6-2. 1st fl. #1323  0D/1D/2D/3D III-V materials grown by MBE for Optelectronics file
417 2018-03-16 14:30  E6-2. 1st fl. #1323  산화물 다층박막에서의 다양한 물리현상 file
416 2018-03-16 14:30  E6-2. 1st fl. #1323  산화물 다층박막에서의 다양한 물리현상 file
415 2016-12-8 16:00  #1323(E6-2. 1st fl.)  Dynamical Resonance between Two Optical Cavities via Optomechanical Oscillator
414 2023-05-22 13:00  E6-6 119  Design & Development of Electrochemical Biosensors for the Detection of T2DM Biomarkers
413 2017-03-02 16:00  #1323(E6-2. 1st fl.)  “Progress in the comparison of ARPES to DMFT for d and f strongly correlated electron systems”
412 2019-12-03 16:00  #1323, E6-2  Toward Quantum Materials with Correlated Oxides file
411 2016-04-01 16:15  E6-2. 1st fl. #1501  Cotunneling drag effect in Coulomb-coupled quantum dots
410 2015-08-03 10:30  E6-2, #1323 (Seminar Room)  Axion Search
409 2016-11-04 13:30  E6-2. #1323(1st fl.)  Exotic phenomena at oxide LaAlO3/SrTiO3 hetero-interface and their applications
408 2018-10-19 10:00  #1323, E6-2  Energy conversion processes during magnetic reconnection in a laboratory plasma file
407 2018-12-07 16:00  E6-2. 1st fl. #1323  Novel probes of interacting electrons in 2D systems file
406 2019-09-27 14:30  E6-2. 1st fl. #1323  Spin-charge conversion in topological insulators for spintronic applications file