visual
visual

세미나

  • HOME
  • >
  • 소식
  • >
  • 세미나
날짜 2024-02-16 10:00 
일시 Feb.16th(Fri) 10:00AM 
장소 E6, #1323 
연사 Hyeok-Jun Yang (Dep. of Physics, University of Notre Dame) 
물리학과에서는 아래와 같이 세미나를 개최하고자 하오니, 관심있는 분들의 많은 참석 부탁드립니다.
 
Date: 10:00 Am, 16th Feb. (Fri)
 
Venue: E6, #1323
 
Speaker: Hyeok-Jun Yang (Department of Physics, University of Notre Dame)
 
Title: Optical conductivity of superconducting states driven by Van Hove singularities
 
Abstract: 

In Van der Waals materials, the Van Hove singularity (VHS) enhances interaction effects and can drive a rich variety of collective orders and topological phases, including conventional and unconventional superconductivity. Although the diverging density of states and susceptibilities have been extensively studied, the VHS type such as the degree of divergence is often unclear in experiments. In this work, we theoretically show that the optical response in superconducting states can be used to experimentally infer the energy dispersion of relevant VHS. Our remark is that the current relaxation is related to the effective mass behavior so that the optical absorption intensity dramatically depends on the VHS type. Our study suggests the anisotropy of absorption spectra as a possible signature to distinguish and identify two types of VHS, conventional and higher-order VHS. 

 
 
번호 날짜 장소 제목
296 2018-03-16 16:00  E6-2. 1st fl. #1323  Van der Waals Heterostructures from Quantum Transport to Ultrafast Optoelectronics file
295 2015-11-06 16:30  E6-2, #5318  Topological Dirac line nodes in centrosymmetric semimetals
294 2019-04-19 14:30  E6-2. 1st fl. #1323  A family of finite-temperature electronic phase transitions in graphene multilayers file
293 2019-11-01 14:30  E6-2. 1st fl. #1323  Squeezing the best out of 2D materials file
292 2017-09-26 11:00  #1323 (E6-2. 1st fl.)  Time-resolved ARPES study of Dirac and topological materials
291 2016-04-08 13:30  E6-2. 1st fl. #1501  Theoretical Overview of Iron-based superconductors and its future
290 2019-06-28 13:30  #1323, E6-2  Magnetic domains and domain wall conduction in pyrochlore iridate thin films and heterostructures file
289 2016-10-27 16:00  #1323(E6-2)  Terahertz Metal Optics
288 2016-11-18 10:30  #5318(5th fl.)  Non-equilibrium many-body spin dynamics in diamond
287 2022-09-15 13:00  E6-2, #1323  AdS black holes: a review
286 2022-05-18 16:00  E6-2. #1323 & Zoom  Geometry, Algebra, and Quantum Field Theory
285 2022-05-19 16:00  E6-2. #1323 & Zoom  Chasing Long Standing Neutrino Anomalies with MicroBooNE
284 2022-05-12 16:00  E6-2. #1323 & Zoom  New frontiers of electroweak physics at the LHC
283 2024-01-16 16:00  E6-2, #2502  [High Energy Theory Seminar] Towards quantum black hole microstates
282 2019-12-27 15:00  E6-2,#5318  The superconducting order parameter puzzle of Sr2RuO4 file
281 2019-12-27 15:00  #5318, E6-2  The superconducting order parameter puzzle of Sr2RuO4 file
280 2019-09-26 16:00  #1323, E6-2  Entanglement Swapping with Autonomous Polarization-Entangled Photon-Pairs from Warm Atomic Ensemble file
279 2023-11-30 10:30  E6-2, #1322  [High-Energy Theory Seminar] 3d-3d correspondence and 2d N = (0,2) boundary conditions
278 2020-01-17 16:00  #1323, E6-2  Symmetry Breaking and Topology in Superfluid 3He file
277 2019-08-27 16:00  Rm. 1323, E6  Critical current properties of Fe-based superconductors file