visual
visual

세미나

  • HOME
  • >
  • 소식
  • >
  • 세미나
날짜 2022-01-11 15:00 
일시 Jan. 11th(Tue), 15:00 
장소 E6 #1501 
연사 Soyeun Kim(UIUC) 

 

Physics Seminar

 

 

 

 

Ultrafast optical studies on CDW collective modes of the Weyl-CDW (TaSe4)2I

 

 

Soyeun Kim

Department of Physics,

Univ. Illinois at Urbana-Champaign (UIUC)

 

Jan. 11th (Tue), 15:00, E6 #1501

 

 

(TaSe4)2I provides an excellent platform to explore topology, lattice, and charge degrees of freedom. It is a non-magnetic Weyl semimetal with a quasi-1D charge-density wave phase transition (TC ~ 260 K) on its structurally chiral lattice. Because the pairs of Weyl fermions are coupled by a CDW modulation, the phase part of the CDW collective mode is suggested to follow the axion electrodynamics described by θE·B [1,2]. As a result, exciting phenomena such as negative magnetoresistance, quantized photogalvanic and piezomagnetic effects have been proposed [1,3,4]. In this talk, we will investigate the CDW collective modes of (TaSe4)2I using ultrafast optical tools of THz emission and THz-pump birefringence spectroscopy. The experimental results will be discussed and compared to the theoretically suggested magnetoelectric effects in the Weyl-CDW system.

[1] J. Gooth et al., Nature 575, 315 (2019).
[2] W. Shi et al., Nat. Phys. 17, 381 (2021).
[3] D. M. Nenno et al., Nat. Rev. Phys. 2, 682 (2020).
[4] Yu et al., Phys. Rev. B 104, 174406 (2021).

 

 

Contact: Eunjung Jo, (jojo@kaist.ac.kr)

 

번호 날짜 장소 제목
공지 2022-10-24 16:00  E6 #1501(공동강의실)  Physics Colloquim(Fall 2022)
공지 2022-09-21 10:30  E6-1 #1501  [Update 세미나 영상] Distinguished Lecture 'The Magic of Moiré Quantum Matter' Prof. Pablo Jarillo-Herrero(Department of Physics, MIT)
공지 2022-11-11 11:00  E6-2 #1323  [Update 세미나영상] (응집물리 세미나) Honeycomb oxide heterostructures for quantum spin liquid
공지 2022-10-28 11:00  E6-2 #1323  [Update 세미나영상] (응집물리 세미나) Machine-Learning-Guided Prediction models and Materials discovery for high Tc cuprates
공지 2022-10-07 11:00  E6-2 #1323  [Update 세미나 영상] (응집물리 세미나) Competing orders in a vanadium-based kagome metal monolayer
공지 2022-09-23 11:00  E6-2 #1323  [Update 세미나 영상] (응집물리 세미나) Steady Floquet-Andreev states in graphene Josephson junctions
공지 2022-09-22 11:00  E6-1 #1323  2022 가을학기 응집물리 및 광학 세미나 전체 일정
257 2012-02-13 16:00  E6, 1501  Physics Colloquium : 2012 Spring
256 2011-09-03 16:00  E6, 1501  Physics Colloquium : 2011 Fall file
255 2011-05-16 16:00  E6, 1501  Photonics with surface plasmon polaritons
254 2010-02-14 16:00  E6, 1501  Physics Colloquium - 2011 Spring file
253 2010-09-06 16:00  E6, 1501  Physics Colloquium : 2010 Fall file
252 2010-02-08 16:00  E6, 1501  Physics Ciolloquium : 2010 Spring file
251 2009-10-21 16:00  E6, 1501  Interdimensional Universality of Dynamic Interfaces
250 2009-09-07 16:00  E6, 1501  Physics Colloquium : 2009 Fall file
249 2009-02-23 16:00  E6, 1501  Physics Colloquium : 2009 Spring file
248 2014-12-22 14:00  E6, Rm1319  Dynamics of molecular motors: Power stroke vs Brownian ratchet file
247 2022-08-18 10:00  E6-1 #1323  Disorder-driven phase transition in the second-order non-Hermitian skin effect
246 2022-08-12 10:00  E6-1 #1323  Twisted Bilayer Magnets file
245 2022-08-12 10:00  E6-1 #1323  Twisted Bilayer Magnets file
244 2022-05-20 11:00  E6-1 #1323  (응집물리 세미나) Exploration of new polymorphs in van der Waals crystals
243 2022-04-08 11:00  E6-1 #1323  (응집물리 세미나) Flat-surface-assisted physical phenomena occurring in single crystal metal thin film file
242 2022-03-25 11:00  E6-1 #1323  (응집물리 세미나) Hund's metallicity in ruthenate systems file
241 2018-10-24 10:30  E6-1, Lecture Room 1501(1F)  Photonic integration of next-generation clocks and Hertz-absolute-accuarcy optical frequenncy synthesizers file
240 2018-12-26 16:00  E6-1. 3rd fl. #3434  Informal Workshop on Topology and Correlation file