visual
visual

세미나

  • HOME
  • >
  • 소식
  • >
  • 세미나
장소 E6-2, #5318 
일시 2015/11/06, 4:30 PM 
연사 Dr. Youngkuk Kim (University of Pennsylvania) 

Topological Dirac line nodes in centrosymmetric semimetals

 

Dr. Youngkuk Kim, University of Pennsylvania
Nov. 6 (Fri), 16:30 PM,  #5318(E6-2)

 

Dirac line nodes (DLNs) are one-dimensional Dirac nodes of energy manifolds in momentum space. In the presence of inversion symmetry and time-reversal symmetry, crystals with vanishing spin-orbit coupling can host topologically protected DLNs.

Recently, we have proposed and characterized a novel Z2 class of the DLN semimetals [1]. Z2 topological invariants, dictating the presence of DLNs, are developed based on the parity eigenvalues at the parity-invariant points of reciprocal space. Our first-principles calculations show that DLN semimetals can be realized in Cu3N in anti-ReO3 structure via metal-insulator electronic transition, driven by transition metal doping. We will also discuss the surface consequence and the effect of spin-orbit coupling of DLN materials.
[1] Youngkuk Kim, Benjamin J. Wieder, C. L. Kane, and Andrew M. Rappe, Phys. Rev. Lett. 115, 036806 (2015)

 

Contact: MyungJoon Han, Physics Dept., (mj.han@kaist.ac.kr)

번호 일시 장소 연사 제목
공지 2019/03/21 - 5/30  Seminar Room #1323  Dr. Hyangtag Lim (KIST) and etc.  Spring 2019: Physics Seminar Serises
공지 2019/02/25 - 06/03  Seminar Room 1501  양용수 교수 (Prof. Yongsoo Yang, KAIST) and etc.  Spring 2019: Physics Colloquium
5 2010/09/06-12/06  E6, 1501  조호진기자(조선일보) 외  Physics Colloquium : 2010 Fall file
4 2010/02/08-05/03  E6, 1501  최인수교수(서울대) 외  Physics Ciolloquium : 2010 Spring file
3 2009/10/21, 4PM  E6, 1501  최석봉교수(서울대)  Interdimensional Universality of Dynamic Interfaces
2 2009/09/07-11/30  E6, 1501  이주영박사(KIAS) 외  Physics Colloquium : 2009 Fall file
1 2009/02/23-05/04  E6, 1501  안종현교수(성균관대) 외  Physics Colloquium : 2009 Spring file