visual
visual

세미나

  • HOME
  • >
  • 소식
  • >
  • 세미나

Topological Dirac insulator

2017.05.10 14:46

관리자 조회 수:1427

날짜 2017-05-12 13:30 
일시 May. 12 (Fri.), 01:30 PM 
장소 E6-2. 1st fl. #1323 
연사 Dr. Young Kuk Kim 

“Topological Dirac insulator”

 

Dr. Young Kuk Kim 

Sungkyunkwan University 

 

May. 12 (Fri.), 01:30 PM

E6-2. 1st fl. #1323

 

 

The discovery of a topological insulator in 2005 led to remarkable development of topological band theory, revealing a variety of symmetry-protected topological insulators and semimetals. Here we introduce our recent finding of a novel topological crystalline insulating phase, referred to as a topological Dirac insulator [1]. A topological Dirac insulator is a bulk insulator with protected metallic surface states, allowed by non-symmorphic space group symmetries. Unlike conventional topological insulators, the surface states of a topological Dirac insulator occur as a four-fold degenerate Dirac point, considered as a topological phase boundary between a two-dimensional topological insulator and a normal insulator. We introduce Z4xZ2 topological invariants that characterizes topological Dirac insulator phase and demonstrate how to evaluate from the Wilson loop calculations. We also discuss its material realizations based on first-principles calculations.

 

[1] Wieder, Benjamin J., Barry Bradlyn, Zhijun Wang, Jennifer Cano, Youngkuk Kim, Hyeong-Seok D. Kim, A. M. Rappe, C. L. Kane, and B. Andrei Bernevig. "Wallpaper Fermions and the Topological Dirac Insulator." arXiv preprint arXiv:1705.01617 (2017). 

 

Contact: Eun Gook Moon, Physics Dept., (egmoon@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
339 2018-05-31 16:00  #1323, E6-2  Dynamic control of optical properties with gated-graphene metamaterials file
338 2018-05-29 16:00  #1323, E6-2  Investigation on metal nanostructure/semiconductor junction and its applications file
337 2018-05-09 16:00  #1323, E6-2  Recent advances in thermoelectric bulk composites file
336 2019-09-18 16:00  Seminar Room #1323  Fall 2019: Physics Seminar Serises file
335 2016-10-17 11:00  #1323,(E6-2, 1st fl.)  IMS and examples of the studies on optoelectronic materials
334 2019-09-02 16:00  Seminar Room 1501  Fall 2019: Physics Colloquium file
333 2016-04-28 15:00  #2501(E6-2. 2nd fl.)  Lattice/Spin/Charge Coupling in 5d Pyrochlore Cd2Os2O7
332 2019-12-13 13:00  #2501, E6-2  Computational Material Designs: Current Status and Future Directions file
331 2018-04-06 10:00  #2502, E6  Entanglement and thermalization in many-body systems: recent progress file
330 2019-09-10 15:00  #2502, E6-2  (2+1) D Duality Web from 3D Euclidean Lattice file
329 2019-06-27 14:00  #2502, E6-2  Gapless Kitaev Spin Liquid to Loop and String Gases file
328 2019-11-20 16:00  #5302, E6-2  Correlation between superconducting transition temperature and critical current density in irradiated iron-based superconductors file
327 2019-02-21 16:00  #5313, E6-2  B-meson charged current anomalies - Theoretical status file
326 2017-11-08 13:00  #5318 (E6-2. 5th fl.)  “Emergent exotic quasiparticles in quantum spin liquids” file
325 2016-11-18 10:30  #5318(5th fl.)  Non-equilibrium many-body spin dynamics in diamond
324 2017-08-31 14:00  #5318(E6-2. 5th fl.)  “Berry phase and nonlinear response: photocurrent in noncentrosymmetric insulators and Weyl semimetals” file
323 2019-12-27 15:00  #5318, E6-2  The superconducting order parameter puzzle of Sr2RuO4 file
322 2019-05-21 16:00  #5318, E6-2  Classification of flat bands according to the band-crossing singularity of Bloch wave functions file
321 2018-02-12 15:00  #C303, (Creation Hall 3F, KAIST Munji Campus)  The recent result of XMASS Experiment
320 2020-10-15 16:00  (https://kaist.zoom.us/j/93997220310)  Towards resource-efficient and fault-tolerant quantum computation with nonclassical light