visual
visual

세미나

  • HOME
  • >
  • 소식
  • >
  • 세미나

Topological Dirac insulator

2017.05.10 14:46

관리자 조회 수:7413

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)
375 2022-05-20 11:00    (응집물리 세미나) Exploration of new polymorphs in van der Waals crystals
374 2022-05-19 16:00    Chasing Long Standing Neutrino Anomalies with MicroBooNE
373 2022-05-19 15:00    (광학분야 특별세미나)Development of a multimodal optical system for improved disease diagnosis
372 2022-05-19 15:00    (광학분야 특별세미나)Development of a multimodal optical system for improved disease diagnosis
371 2022-05-18 16:00    Geometry, Algebra, and Quantum Field Theory
370 2022-05-16 16:00    Design synthetic topological matter with atoms and lights
369 2022-05-13 16:00    High-fidelity iToffoli gate for fixed-frequency superconducting qubits file
368 2022-05-13 14:30    Topological Superconducting Spintronics Towards Zero-Power Computing Technologies file
367 2022-05-12 16:00    New frontiers of electroweak physics at the LHC
366 2022-05-11 16:00    Gravity as a phenomenon in quantum dynamics
365 2022-05-10 16:00    (광학분야 특별세미나)Testing quantum thermodynamics using quantum optics
364 2022-05-09 16:00    Searching for new electronic properties in correlated material flatland
363 2022-05-02 16:00    What can we learn from the history of science and technology?(우리말강의)
362 2022-04-28 16:00    (광학분야 특별세미나)Adiabaticity and symmetry in optical waveguide design
361 2022-04-25 16:00    Ultrafast electron beam, a tool to explore the nanoscopic world of materials(우리말강의)
360 2022-04-15 11:00    (응집물리 세미나) First-principles studies of polar oxides and their applications file
359 2022-04-14 16:00    (광학분야 특별세미나)Holographic tomography of dielectric tensors at optical frequency
358 2022-04-13 10:30    Harnessing topology and correlations from singularities in 3d-kagome metals
357 2022-04-11 16:00    Emergence of Statistical Mechanics in Quantum Systems
356 2022-04-08 11:00    (응집물리 세미나) Flat-surface-assisted physical phenomena occurring in single crystal metal thin film file