visual
visual

세미나

  • HOME
  • >
  • 소식
  • >
  • 세미나
날짜 2017-06-02 14:30 
일시 Jun. 2 (Fri.), 02:30 PM 
장소 E6-2. 1st fl. #1323 
연사 Dr. Euyheon Hwang(황의헌) 

Quasiparticle Interference and Fourier transform scanning tunneling spectroscopy in WTe2 (Weyl semimetal)

 

Dr. Euyheon Hwang(황의헌)

SAINT and Department of Nanoscience and Technology, Sungkyunkwan University

 

Jun. 2 (Fri.), 02:30 PM

E6-2. 1st fl. #1323

 

Abstract: 

The effect of quasiparticle interference (QPI) on the spatial variations of the local density of states in topological Weyl semimetal will be presented. We consider the QPI on WTe2 which are known as the type II Weyl semimetals. The Weyl semimetals host topologically protected surface states, with arced Fermi surface contours that are predicted to propagate through the bulk when their momentum matches that of the surface projections of the bulk’s Weyl nodes. Recent progress in spectroscopic techniques has enabled the elucidation of various interesting aspects of the electronic states of Weyl semimetals in real and momentum spaces. A number of characteristic behaviors of interference are identified in the Fourier transformed scanning tunneling spectroscopy. We use the T-matrix approximation to analyze the effect of a localized impurity on the local density of states in WTe2. A comparison between our results and scanning tunneling microscopy experiments could provide a critical test of the electronic properties of WTe2. Our results reveal various different scattering wave vectors, which can be understood by taking into account the shape, spin texture, and momentum-dependent propagation of the Fermi arc surface states into the bulk. Our findings provide evidence that Weyl nodes act as sinks for electron transport on the surface of these materials.

번호 날짜 장소 제목
공지 2022-11-25 11:00  E6-2 #1323  [Update 세미나영상](응집물리 세미나) DMFT+ NRG: From models to real materials, from local to nonlocal correlations
268 2012-02-13 16:00  E6, 1501  Physics Colloquium : 2012 Spring
267 2011-09-03 16:00  E6, 1501  Physics Colloquium : 2011 Fall file
266 2011-05-16 16:00  E6, 1501  Photonics with surface plasmon polaritons
265 2010-02-14 16:00  E6, 1501  Physics Colloquium - 2011 Spring file
264 2010-09-06 16:00  E6, 1501  Physics Colloquium : 2010 Fall file
263 2010-02-08 16:00  E6, 1501  Physics Ciolloquium : 2010 Spring file
262 2009-10-21 16:00  E6, 1501  Interdimensional Universality of Dynamic Interfaces
261 2009-09-07 16:00  E6, 1501  Physics Colloquium : 2009 Fall file
260 2009-02-23 16:00  E6, 1501  Physics Colloquium : 2009 Spring file
259 2014-12-22 14:00  E6, Rm1319  Dynamics of molecular motors: Power stroke vs Brownian ratchet file
258 2022-09-22 11:00  E6-1 #1323  2022 가을학기 응집물리 및 광학 세미나 전체 일정 file
257 2022-08-18 10:00  E6-1 #1323  Disorder-driven phase transition in the second-order non-Hermitian skin effect
256 2022-08-12 10:00  E6-1 #1323  Twisted Bilayer Magnets file
255 2022-08-12 10:00  E6-1 #1323  Twisted Bilayer Magnets file
254 2022-05-20 11:00  E6-1 #1323  (응집물리 세미나) Exploration of new polymorphs in van der Waals crystals
253 2022-04-08 11:00  E6-1 #1323  (응집물리 세미나) Flat-surface-assisted physical phenomena occurring in single crystal metal thin film file
252 2022-03-25 11:00  E6-1 #1323  (응집물리 세미나) Hund's metallicity in ruthenate systems file
251 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) file
250 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
249 2018-12-26 16:00  E6-1. 3rd fl. #3434  Informal Workshop on Topology and Correlation file