visual
visual

세미나

  • HOME
  • >
  • 소식
  • >
  • 세미나

Topological Dirac insulator

2017.05.10 14:46

관리자 조회 수:1682

날짜 2017-05-12 13:30 
일시 May. 12 (Fri.), 01:30 PM 
장소 E6-2. 1st fl. #1323 
연사 Dr. Young Kuk Kim 

“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 장소 제목
306 2024-01-03 11:00  E6-2, #1323  Interplay of Strong Correlations, Topology, and Disorder in 2D Quantum Matters
305 2022-01-11 15:00  E6 #1501  Ultrafast optical studies on CDW collective modes of the Weyl-CDW (TaSe4)2I file
304 2023-01-12 14:40  E6-2 #1323  JILA 1D Wannier-Stark optical lattice clock file
303 2022-01-17 14:00  E6-2 Room 2502  Five Lectures on Observational Probes of Dark Energy file
302 2022-01-18 14:00  KI bldg. 5th fl. Room B501 & Zoom  Data-driven interrogation of biological dynamics: from subcellular interactions to neuronal networks in vivo file
301 2022-01-25 15:00  E6 #1501/online  Emulating twisted double bilayer graphene with a multiorbital optical lattice file
300 2022-01-26 13:00  E6 #1501  An Introduction to Cohomology groups file
299 2019-01-07 15:00  E6-2. 2st fl. #2501  Many-Body Invariants for Multipoles in Higher-Order Topological Insulators file
298 2024-01-16 14:00  E6-2, #1323  Dimer Physics and Superconductivity in La3Ni2O7
297 2021-01-28 15:00  Zoom  Topological Transport of Deconfined Hedgehogs in Magnets file
296 2021-01-28 18:00  Online Seminar  Quantum metamaterials: concept, theory, prototypes and possible applications file
295 2019-01-09 16:00  E6-2. 2nd fl. #2501  Molecular Mott state in the deficient spinel GaV4S8 file
294 2020-01-17 16:00  #1323, E6-2  Symmetry Breaking and Topology in Superfluid 3He file
293 2019-01-23 16:00  Rm. C303, Creation Hall (3F), Munji Campus  Ultrasensitive Microwave Bolometer: Opportunity for Axion Detectors file
292 2023-07-14 11:00  E6-2 #1501  Interfaces engineering of thin film oxides
291 2019-07-03 15:00  E6-2, 2501  Many-body quantum electrodynamis (QED) with atoms and photons: A new platform for quantum optics" file
290 2016-07-07 14:00  #1323(E6-2. 1st fl.)  Let there be topological superconductors
289 2016-07-08 11:00  #1323(E6-2. 1st fl.)  Isostatic magnetism
288 2016-07-08 14:00  #1323(E6-2. 1st fl.)  Electronic quasiparticles in the quantum dimer model
287 2022-07-14 13:30  E6 #1501 & Zoom  Electronic structure and anomalous transport properties of topological materials by first principle calculation