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 2022-10-24 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
280 2022-05-16 16:00  E6, #1501  Design synthetic topological matter with atoms and lights
279 2022-05-09 16:00  E6, #1501  Searching for new electronic properties in correlated material flatland
278 2022-05-02 16:00  E6, #1501  What can we learn from the history of science and technology?(우리말강의)
277 2022-04-25 16:00  E6, #1501  Ultrafast electron beam, a tool to explore the nanoscopic world of materials(우리말강의)
276 2022-04-11 16:00  E6, #1501  Emergence of Statistical Mechanics in Quantum Systems
275 2022-04-04- 16:00  E6, #1501  New paradigms in Quantum Field Theory
274 2022-03-28 16:00  E6, #1501  Ultimate-density atomic semiconductor via flat bands
273 2022-03-21 16:00  E6, #1501  Multi-wavelength Studies on Relativistic Jets from Gamma-ray Bright Active Galactic Nuclei
272 2022-03-14 16:00  E6, #1501  Quantitative phase imaging and artificial intelligence: label-free 3D imaging, classification, and inference
271 2022-03-07 16:00  E6, #1501  Climate Physics and Modelling(우리말강의)
270 2022-02-28 16:00  E6, #1501  Spin-based training of optical microscopes
269 2015-10-23 10:30  E6, #1501  How to write a good scientific paper[Open lecture series]
268 2016-03-07 16:00  E6, 1501  Physics Colloquium : 2016 Spring file
267 2015-09-07 16:00  E6, 1501  Physics Colloquium : 2015 Fall file
266 2015-03-09 16:00  E6, 1501  Physics Colloquium : 2015 Spring file
265 2015-09-15 16:00  E6, 1501  Physics Colloquium : 2014 Fall file
264 2014-03-10 16:00  E6, 1501  Physics Colloquium : 2014 Spring file
263 2013-09-09 16:00  E6, 1501  Physics Colloquium : 2013 Fall
262 2013-03-11 16:00  E6, 1501  Physics Colloquium : 2013 Spring
261 2012-04-02 16:00  E6, 1501  A new route to ferroelectricity in magnetic spinels: a case of Co2MnO4