visual
visual

세미나

  • HOME
  • >
  • 소식
  • >
  • 세미나

Topological Dirac insulator

2017.05.10 14:46

관리자 조회 수:7242

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)
445 2018-11-22 15:00    Experimental and Computational Study on Physical Properties based on Granular System file
444 2021-02-17 09:00    석학 대중 강연 및 강의 시리즈 file
443 2019-04-04 16:00    Chiral spin-photon interaction at nanoscale file
442 2023-11-22 10:00    [High Energy Theory Seminar] Exact Quantum Algorithms to Recognize Quantum Phases of Matter
441 2019-05-24 16:00    Infrared spectroscopy study on metal-insulator transitions in layered perovskite iridates file
440 2023-06-16 13:00    Quantum critical states under extreme conditions
439 2019-12-05 16:00    Subwavelenth Photonic Devices: From Single Photon Sources to Solar Cell file
438 2018-10-04 16:00    Engineering light absorption in an ultrathin semiconductor metafilm file
437 2019-07-10 16:00    Public Lectures file
436 2019-07-16 16:00    2019 Physics Distinguished Lecture file
435 2019-12-18 16:00    Road to Higher Tc Superconductivity file
434 2016-06-14 15:00    No-Insulation High Temperature Superconductor Magnet Technology for Compact, Reliable, and Low-Cost High Field DC Magnets
433 2018-11-21 15:00    Engineering topological quantum physics at the atomic scale file
432 2022-04-08 11:00    (응집물리 세미나) Flat-surface-assisted physical phenomena occurring in single crystal metal thin film file
431 2019-10-29 10:00    Unconventional Spin Transport in Quantum Materials file
430 2021-02-02 14:30    Quantum- & Nano-Photonics 세미나(Integrated Nanophotonics with Metamaterials, Microcomb, and Atomic Systems) file
429 2018-11-23 15:00    Entanglement string and Spin Liquid with Holographic duality file
428 2018-06-22 10:00    Success in Research Career file
427 2016-04-18 15:30    First Principles Approaches for Intermolecular Interactions: From Gas-Phase Dimers to Liquid Water and Molecular Crystal Polymorphism file
426 2020-12-02 10:00    Recent progress in Axion Dark Matter eXperiment (ADMX) technology file