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
184 2022-04-11 16:00  E6, #1501  Emergence of Statistical Mechanics in Quantum Systems
183 2022-05-23 16:00  E6, #1501  Novel electronic transport in topological van der Waals magnets
182 2022-05-09 16:00  E6, #1501  Searching for new electronic properties in correlated material flatland
181 2022-04-04- 16:00  E6, #1501  New paradigms in Quantum Field Theory
180 2022-05-16 16:00  E6, #1501  Design synthetic topological matter with atoms and lights
179 2022-05-30 16:00  E6, #1501  Light manipulation using 2D layered semiconductors
178 2015-10-23 10:30  E6, #1501  How to write a good scientific paper[Open lecture series]
» 2024-02-16 10:00  E6, #1323  Optical conductivity of superconducting states driven by Van Hove singularities
176 2023-07-10 16:00  E6, #1323  Electronic structures of magnetic and non-magnetic ordering in d- and f-electrons systems
175 2019-07-08 14:00  E6, #1322  Ultrabroadband squeezed pulses and their relation to relativity file
174 2022-05-25 14:00  E6 Room(#2501)  Atomic-level insights into ferroelectric switching and preferred orientation of ultrathin hafnia file
173 2018-11-22 15:00  E6 Room(#1323)  Experimental and Computational Study on Physical Properties based on Granular System file
172 2019-08-06 16:00  E6 Room(#1323)  Visualization of in-plane piezoresponse vector fields file
171 2019-08-16 14:00  E6 Room(#1323)  Multiferroic and Magnetoelectric Effects by Tailoring Interfacial Chemistry and Physics in Correlated Oxides file
170 2019-05-08 16:00  E6 Room(#1323)  Imaging valley dependent electron transport in 2D semiconductors file
169 2019-08-01 14:00  E6 Room(#1323)  Low-density Superconductivity in SrTiO3 Probed by Planar Tunneling Spectroscopy file
168 2023-02-28 11:00  E6 Room(#1322)  Topotactic redox engineering toward novel material file
167 2022-06-23 11:00  E6 Room(#1322)  JILA’s search for the electron’s Electric Dipole Moment (eEDM) to probe physics beyond the standard model file
166 2022-05-10 16:00  E6 1323  (광학분야 특별세미나)Testing quantum thermodynamics using quantum optics
165 2022-04-28 16:00  E6 1323  (광학분야 특별세미나)Adiabaticity and symmetry in optical waveguide design