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)
606 2019-09-18 16:00    Fall 2019: Physics Seminar Serises file
605 2019-09-02 16:00    Fall 2019: Physics Colloquium file
604 2024-01-26 15:00    In-situ 4D-STEM studies on surface reconstruction and polarization switching of perovskite oxides
603 2020-09-24 09:00    (CAPP/IBS)Searching for Dark Matter with a Superconducting Qubit , Cryogenic Microwave Circuit Development at the NSTU file
602 2021-01-28 18:00    Quantum metamaterials: concept, theory, prototypes and possible applications file
601 2023-09-18 11:00    Magic polarisation trapping of polar molecules for tunable dipolar interactions file
600 2015-12-09 14:00    SWELLABLE COLLOIDAL PARTICLES ARE SWELL
599 2015-12-09 11:00    Functional Imaging & Monitoring of Brain & Breast with Diffuse Light
598 2020-09-28 17:30    KAIST Global Forum for Spin and Beyond(Fourth Forum) file
597 2024-03-28 11:00    Geometric characterization of thermoelectric performance of two-dimensional quadratic band-crossing semimetals
596 2023-01-12 16:00    Spin wavepackets in the Kagome ferromagnet Fe3Sn2: propagation and precursors
595 2021-04-19 19:00    Evidence of Electrical Switching in Antiferromagnets and Coherent Spin Pumping file
594 2017-12-14 15:00    Exploring the Universe via GWs in the era of multi-messenger astronomy
593 2019-10-25 15:00    Physics Seminar file
592 2024-11-21 11:00  Daniel L. Jafferis  3d Gravity and Tensor Model file
591 2023-10-04 16:00    [High-Energy Theory Seminar] Moving towards quantum technologies: the case of quantum batteries
590 2024-06-05 10:00    Moir\’e fractals in supermoir\’e structures
589 2016-12-12 13:30    “Possible symmetry in the phase diagrams of electron- & hole-doped cuprate high-Tc superconductors”
588 2025-06-05 10:00  Dr . On Kim (University of Mississippi)  The Final Result from the Muon g-2 Experiment at Fermilab: The World’s Most Precise Measurement of the Muon Magnetic Anomaly file
587 2016-04-06 15:30    Superconducting Quantum Interference Devices for Precision Detection