visual
visual

세미나

  • HOME
  • >
  • 소식
  • >
  • 세미나

Topological Dirac insulator

2017.05.10 14:46

관리자 조회 수:1568

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
공지 2022-11-25 11:00  E6-2 #1323  [Update 세미나영상](응집물리 세미나) DMFT+ NRG: From models to real materials, from local to nonlocal correlations
157 2019-12-13 13:30  #1323, E6-2  Biophysics Mini-symposium at KAIST file
156 2019-12-18 16:00  #1323, E6-2  Road to Higher Tc Superconductivity file
155 2019-12-27 15:00  #5318, E6-2  The superconducting order parameter puzzle of Sr2RuO4 file
154 2019-12-27 15:00  E6-2,#5318  The superconducting order parameter puzzle of Sr2RuO4 file
153 2020-01-17 16:00  #1323, E6-2  Symmetry Breaking and Topology in Superfluid 3He file
152 2020-02-12 13:00  E6-2, #5318  From inflation to new weak-scale file
151 2020-02-13 16:30  E6-6, #119  Enhanced Light-Matter Interactions in Graphene with Noble Metal Plasmonic Structures file
150 2020-02-20 16:00  #1323, E6-2  Unconventional superconductivity in the locally non-centrosymmetric heavy-fermion CeRh2As2 file
149 2020-07-02 16:00  Zoom Video Conference Seminar  An irreversible qubit-photon coupling for the detection of itinerant microwave photons file
148 2020-08-17 20:00  Zoom webinar  Using magnetic tunnel junctions to compute like the brain file
147 2020-08-25 20:00  Zoom webinar  KAIST Global Forum for Spin and Beyond (Second Forum) file
146 2020-09-11 14:00  zoom  SRC Seminar file
145 2020-09-14 17:30  Zoom webinar  KAIST Global Forum for Spin and Beyond (Third Forum) file
144 2020-09-22 09:30  Zoom webinar  Physics and applications of soliton microcombs(Quantum- & Nano-Photonics) file
143 2020-09-24 09:00  Zoom Video  (CAPP/IBS)Searching for Dark Matter with a Superconducting Qubit , Cryogenic Microwave Circuit Development at the NSTU file
142 2020-09-28 17:30  Zoom webinar  KAIST Global Forum for Spin and Beyond(Fourth Forum) file
141 2020-10-09 09:00  https://kaist.zoom.us/j/85161896513?pwd=U3pwWFFZaWVRamxDZUR5REhNeVk0UT09  Quantum Many-Body Simulation file
140 2020-10-15 16:00  CAPP Seminar Room #C303, Creation Hall (3F), KAIST Munji Campus  Graphene-based Josephson junction microwave bolometer file
139 2020-10-15 16:00  (https://kaist.zoom.us/j/93997220310)  Towards resource-efficient and fault-tolerant quantum computation with nonclassical light
138 2020-10-15 17:00  https://bit.ly/3ndIiJn  Time crystals, quasicrystals, and time crystal dynamics in the superfluid universe file