“Symmetry and topology in transition metal dichalcogenide?”
2016.10.06 18:55
장소 | E6-2. #1323(1st fl.) |
---|---|
일시 | Oct. 07 (Fri), 1:30 PM |
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)
댓글 0
번호 | 일시 | 장소 | 연사 | 제목 |
---|---|---|---|---|
196 | August. 1st (Thu), 14:00 | E6 Room(#1323) | Hyeok Yoon |
Low-density Superconductivity in SrTiO3 Probed by Planar Tunneling Spectroscopy
![]() |
195 | August 27 (Tue.), 4:00PM | Rm. 1323, E6 | Hiroshi Eisaki |
Critical current properties of Fe-based superconductors
![]() |
194 | January 17 (Fri), 4:00 PM | #1323, E6-2 | Hiroki Ikegami |
Symmetry Breaking and Topology in Superfluid 3He
![]() |
193 | September 26 (Thu.), 16:00 PM | #1323, E6-2 | Han Seb Moon |
Entanglement Swapping with Autonomous Polarization-Entangled Photon-Pairs from Warm Atomic Ensemble
![]() |
192 | December 27(Fri.), 15:00 | E6-2,#5318 | Han Gyeol Suh |
The superconducting order parameter puzzle of Sr2RuO4
![]() |
191 | Dec 27 (Fri), 3:00 PM | #5318, E6-2 | Han Gyeol Suh |
The superconducting order parameter puzzle of Sr2RuO4
![]() |
190 | May. 12(Thu), 4pm | E6-2. #1323 & Zoom | Dr.Philip Chang (University of California San Diego, Department of Physics) | New frontiers of electroweak physics at the LHC |
189 | May. 19(Thu), 4pm | E6-2. #1323 & Zoom | Dr.Jay Hyun Jo (Yale University, Department of Physics) | Chasing Long Standing Neutrino Anomalies with MicroBooNE |
188 | May. 18(Wed), 4pm | E6-2. #1323 & Zoom | Dr.Heeyeon Kim (Rutgers University, Department of Physics and Astronomy) | Geometry, Algebra, and Quantum Field Theory |
187 | Nov. 18th (Fri) 10:30 a.m. | #5318(5th fl.) | Dr. 최 순 원, Havard University | Non-equilibrium many-body spin dynamics in diamond |
186 | Oct. 27th(Thu) 4PM | #1323(E6-2) | Dr. 이 강 희, KAIST, Mechnical Engineering | Terahertz Metal Optics |
185 | June 28 (Fri.), 13:30 PM | #1323, E6-2 | Dr. Yusuke Kozuka |
Magnetic domains and domain wall conduction in pyrochlore iridate thin films and heterostructures
![]() |
184 | Apr. 08 (Fri.), 13:30 PM | E6-2. 1st fl. #1501 | Dr. Yunkyu Bang, Chonnam National Univ. | Theoretical Overview of Iron-based superconductors and its future |
183 | Sep. 26 (Tue.), 11AM | #1323 (E6-2. 1st fl.) | Dr. Yukiaki Ishida / ISSP, University of Tokyo | Time-resolved ARPES study of Dirac and topological materials |
182 | Nov. 1 (Fri.), 02:30 PM | E6-2. 1st fl. #1323 | Dr. YoungWook Kim |
Squeezing the best out of 2D materials
![]() |
181 | Apr. 19 (Fri.), 02:30 PM | E6-2. 1st fl. #1323 | Dr. YoungWoo Nam |
A family of finite-temperature electronic phase transitions in graphene multilayers
![]() |
180 | 2015/11/06, 4:30 PM | E6-2, #5318 | Dr. Youngkuk Kim (University of Pennsylvania) | Topological Dirac line nodes in centrosymmetric semimetals |
179 | Mar. 16 (Fri.), 04:0 PM | E6-2. 1st fl. #1323 | Dr. YoungDuck Kim |
Van der Waals Heterostructures from Quantum Transport to Ultrafast Optoelectronics
![]() |
178 | May 13 (Fri.), 1:30 PM | E6. #1501(1st fl.) | Dr. Young-Woo Son, Dept. of Physics, KIAS | Aperiodic crystals in low dimensions |
177 | April 11 (Wed), 4:00pm | #1323 (E6-2, 1st fl.) | Dr. Young-Sik Ra |
Non-Gaussian states of multimode light generated via hybrid quantum information processing
![]() |