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
173 2019-05-03 11:00  E6-2. 2st fl. #2502  Exotic Magnetism file
172 2015-03-04 12:00  1323호, E6-2  Bioimaging and Biosensing Using Near-Infrared Fluorescence file
171 2022-10-04 16:00  E6 #2501  Distinguishing 6d (1, 0) SCFTs
170 2016-03-07 16:00  E6, 1501  Physics Colloquium : 2016 Spring file
169 2019-09-18 16:00  Seminar Room #1323  Fall 2019: Physics Seminar Serises file
168 2019-02-21 16:00  #5313, E6-2  B-meson charged current anomalies - Theoretical status file
167 2022-09-21 16:00  College of Natural Science E6-2, Rm. 1323  Materials and Device Nanofabrication of Optical Metasurfaces file
166 2022-06-03 11:00  E6-2 #1323  (응집물리 세미나) Theoretical Investigation of Exotic Quantum States in Low-dimensional Materials
165 2020-10-15 16:00  CAPP Seminar Room #C303, Creation Hall (3F), KAIST Munji Campus  Graphene-based Josephson junction microwave bolometer file
164 2015-07-23 13:30  E4, B401  Enhanced ZnO based UV photonics and related applications file
163 2022-05-27 11:00  Online seminar  Current Status and Future Plans of ADMX file
162 2019-05-31 11:00  #1323, E6-2  Cavity QED with Spin Qubits file
161 2017-08-31 14:00  #5318(E6-2. 5th fl.)  “Berry phase and nonlinear response: photocurrent in noncentrosymmetric insulators and Weyl semimetals” file
160 2018-12-11 16:00  E6-2. 1st fl. #1323  Natural compact representation of Matsubara Green’s functions: applications to analytic continuation and quantum many-body simulations file
159 2018-07-13 14:00  Room 5318, KAIST Natural Sciences Lecture Hall(E6).  Loop Induced Single Top Partner Production and Decay at the LHC
158 2020-10-23 14:00  E6-2 #1323  Plasmon spectroscopy of low-dimensional superconductors in fluctuating regime file
157 2018-05-29 16:00  #1323, E6-2  Investigation on metal nanostructure/semiconductor junction and its applications file
156 2019-11-07 16:00  #1323, E6-2  Integrated quantum photonics with solid-state quantum emitters file
155 2017-12-15 09:20  E6-2, Lecture Room #1323  Workshop on Magnetism in Unconventional Superconductors 개최 file
154 2019-11-14 16:00  #1323, E6-2  Semi-classical model of polariton propagation file