visual
visual

세미나

  • HOME
  • >
  • 소식
  • >
  • 세미나

Topological Dirac insulator

2017.05.10 14:46

관리자 조회 수:7433

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)
426 2020-12-02 10:00    Recent progress in Axion Dark Matter eXperiment (ADMX) technology file
425 2020-11-17 12:00    Quantum- & Nano-Photonics" 세미나 시리즈 file
424 2023-05-15 16:00    Role of dark Higgs boson in DM physics and cosmology file
423 2019-10-15 16:00    Moiré superlattices and graphene quasicrystal file
422 2024-07-22 14:00    Nonthermal electronic orders in photo-doped Mott insulators
421 2017-08-16 16:00    Phonon-driven spin-Floquet valleytro-magnetism file
420 2025-02-03 14:00  Prof. Nobuyuki Yoshioka  Towards early fault-tolerant quantum computing file
419 2023-07-14 11:00    Interfaces engineering of thin film oxides
418 2024-07-25 16:00    Generation and Certification of Optical Quantum States for Information Processing file
417 2019-08-14 16:00    Quantum Optics, at the heart of quantum metrology and quantum information file
416 2019-10-17 16:00    Top down manipulation of Waves : From Metamaterials, Correlated Disorder, Quantum Analogy, to Digital Processing file
415 2018-12-27 16:00    Quantum Innovation (QuIN) Laboratory file
414 2025-03-07 11:00  Prof. Myunglae Jo  A tunable Mach-Zehnder interferometer in quantum hall graphene file
413 2023-09-27 16:00    Chiral Magnets: Domain-Wall Skyrmions and String Theory Realization
412 2019-06-04 17:00    Stochastic nature of bacterial eradication using antibiotics file
411 2015-06-03 12:00    The First Wednesday Multidisciplinary Forum file
410 2016-11-10 16:00    Low Dimensional Active Plasmonics and Electron Optics in Graphene
409 2023-07-20 16:00    [CAPP Seminar] Cosmoparticle Physics of Dark Universe file
408 2018-09-07 15:00    Recent developments in density functional theory: From new functionals to the nature of the chemical bond file
407 2021-04-09 10:00    Integrated Lithium Niobate Photonics file