visual
visual

세미나

  • HOME
  • >
  • 소식
  • >
  • 세미나

Topological Dirac insulator

2017.05.10 14:46

관리자 조회 수:7434

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)
506 2022-01-26 13:00    An Introduction to Cohomology groups file
505 2018-10-12 16:00    Direct observation of a two-dimensional hole gas at oxide interfaces file
504 2022-11-18 14:30    Kondo cloud condensation in a highly-doped semiconductor metal file
503 2025-05-01 16:00  Dr. Inwook Kim (Lawrence Livermore National Laboratory)  BSM Physics Search with Quantum Sensors file
502 2018-12-26 16:00    Brane-like defect in 3D toric code file
501 2019-07-31 16:00    Features of ballistic superconducting graphene file
500 2018-07-12 17:00    The MilliQan Experiment: Search for Milli-Charged Particles at the LHC
499 2016-12-09 13:30    Entanglement area law in strongly-correlated systems
498 2023-11-23 16:00    Deciphering the Enigma of Quantum Materials by X-ray Scattering and Spectroscopy
497 2019-10-16 16:00    Emergent black holes and monopoles from quantum fields file
496 2022-07-14 13:30    Electronic structure and anomalous transport properties of topological materials by first principle calculation
495 2016-11-24 16:00    Harmonic oscillator physics with single atoms in a state-selective optical potential
494 2015-09-07 15:00    Advanced Optical Materials and Devices at NRL
493 2021-05-14 16:00    Spatial and temporal separation of environmental dephasing sources from solid-state quantum emitters file
492 2016-04-12 16:00    Confinement of Superconducting Vortices in Magnetic Force Microscopy
491 2017-04-28 14:30    Hot electron generation at surfaces and its impact to catalysis and renewable energy conversion
490 2015-12-11 15:45    Dynamical mean field theory studies on heavy fermion system
489 2023-10-19 11:00    Emergent functionalities of iridium oxide films with different growth orientation file
488 2023-06-26 11:00    Quantum computing on magnetic racetracks with flying domain wall qubits
487 2019-04-19 11:00    First-principles studies of semiconductors for solar cell applications file