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
248 2020-10-16 14:30  https://kaist.zoom.us/j/89198078609  Nanoscale magnetic resonance detection towards nano MRI file
247 2020-10-16 16:00  https://kaist.zoom.us/j/89198078609  Hidden room-temperature ferroelectricity in CaTiO3 revealed by a metastable octahedral rotation pattern file
246 2020-10-23 14:00  E6-2 #1323  Plasmon spectroscopy of low-dimensional superconductors in fluctuating regime file
245 2020-11-12 16:00  E6-2 1323  2020 가을학기 광학분야 특별세미나
244 2020-11-17 12:00  Online(Zoom)  Quantum- & Nano-Photonics" 세미나 시리즈 file
243 2020-11-20 14:30  Online  Lumpy Cooper pairs in an iron-based superconductor
242 2020-11-20 16:00  Online  Coherent control of field gradient induced quantum dot spin qubits
241 2020-11-26 16:00  Online(Zoom)  2020 가을학기 광학분야 특별세미나(Light Engineering Beyond the Diffraction Limit)
240 2020-12-02 10:00  Zoom  Recent progress in Axion Dark Matter eXperiment (ADMX) technology file
239 2020-12-09 10:00  Zoom  Searching for the QCD axion with the ARIADNE experiment file
238 2020-12-10 13:55  Zoom  Consistency of Boltzmann equation and light dark matter from inflaton decay
237 2020-12-11 14:30  online  Antisymmetric interlayer exchange coupling in magnetic multilayers
236 2020-12-11 16:00  online  Atomic and electronic reconstruction at van der Waals interface in twisted 2D materials
235 2020-12-23 10:00  Online  Online workshop for Quantitative Phase Imaging file
234 2021-01-28 15:00  Zoom  Topological Transport of Deconfined Hedgehogs in Magnets file
233 2021-01-28 18:00  Online Seminar  Quantum metamaterials: concept, theory, prototypes and possible applications file
232 2021-02-02 14:30  Zoom  Quantum- & Nano-Photonics 세미나(Integrated Nanophotonics with Metamaterials, Microcomb, and Atomic Systems) file
231 2021-02-15 17:00  Zoom  Magnetic Cluster Octupole Domain evolutation in chiral antiferromagnets file
230 2021-02-17 09:00  Online  석학 대중 강연 및 강의 시리즈 file
229 2021-03-02 16:00  Online  Sensitive terahertz detection with graphene-based transistors file