visual
visual

세미나

  • HOME
  • >
  • 소식
  • >
  • 세미나

Topological Dirac insulator

2017.05.10 14:46

관리자 조회 수:7306

날짜 2017-05-12 13:30 
연사  
장소 E6-2. 1st fl. #1323 

“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 연사 제목
공지 2025-02-24 16:00    2025년 봄학기 콜로키움 안내
공지 2025-02-27 16:00    2025년 봄 물리학과 특별세미나 (광학/응집물리 분야)
414 2018-12-07 14:30    Spin generation from heat and light in metals file
413 2018-12-07 16:00    Novel probes of interacting electrons in 2D systems file
412 2018-12-11 16:00    Natural compact representation of Matsubara Green’s functions: applications to analytic continuation and quantum many-body simulations file
411 2018-12-16 16:00    Lectures on 2d Conformal Field Theory file
410 2018-12-26 16:00    Informal Workshop on Topology and Correlation file
409 2018-12-26 16:00    Brane-like defect in 3D toric code file
408 2018-12-27 16:00    Quantum Innovation (QuIN) Laboratory file
407 2019-01-07 15:00    Many-Body Invariants for Multipoles in Higher-Order Topological Insulators file
406 2019-01-09 16:00    Molecular Mott state in the deficient spinel GaV4S8 file
405 2019-01-23 16:00    Ultrasensitive Microwave Bolometer: Opportunity for Axion Detectors file
404 2019-02-21 16:00    B-meson charged current anomalies - Theoretical status file
403 2019-02-25 16:00    Spring 2019: Physics Colloquium file
402 2019-03-21 16:00    Spring 2019: Physics Seminar Serises file
401 2019-03-26 15:00    Consideration of thermal Hall effect in frustrated and un-frustrated quantum magnets file
400 2019-03-29 14:30    Epitaxial Multifunctional Oxide Thin Films for Novel Electronics file
399 2019-03-29 16:00    Coherent Quantum Control and Magnetism on atoms – Trapped ion and ESR STM file
398 2019-04-04 16:00    Chiral spin-photon interaction at nanoscale file
397 2019-04-11 16:00    Massive screening for cathode active materials using deep neural network file
396 2019-04-19 11:00    First-principles studies of semiconductors for solar cell applications file
395 2019-04-19 14:30    A family of finite-temperature electronic phase transitions in graphene multilayers file