visual
visual

세미나

  • HOME
  • >
  • 소식
  • >
  • 세미나
날짜 2015-11-06 16:30 
일시 2015/11/06, 4:30 PM 
장소 E6-2, #5318 
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 날짜 장소 제목
360 2022-03-07 16:00  E6, #1501  Climate Physics and Modelling(우리말강의)
359 2022-03-14 16:00  E6, #1501  Quantitative phase imaging and artificial intelligence: label-free 3D imaging, classification, and inference
358 2022-02-28 16:00  E6, #1501  Spin-based training of optical microscopes
357 2022-05-02 16:00  E6, #1501  What can we learn from the history of science and technology?(우리말강의)
356 2022-04-11 16:00  E6, #1501  Emergence of Statistical Mechanics in Quantum Systems
355 2022-05-23 16:00  E6, #1501  Novel electronic transport in topological van der Waals magnets
354 2022-05-09 16:00  E6, #1501  Searching for new electronic properties in correlated material flatland
353 2022-04-04- 16:00  E6, #1501  New paradigms in Quantum Field Theory
352 2022-05-16 16:00  E6, #1501  Design synthetic topological matter with atoms and lights
351 2022-05-30 16:00  E6, #1501  Light manipulation using 2D layered semiconductors
350 2015-10-23 10:30  E6, #1501  How to write a good scientific paper[Open lecture series]
349 2016-03-07 16:00  E6, 1501  Physics Colloquium : 2016 Spring file
348 2015-09-07 16:00  E6, 1501  Physics Colloquium : 2015 Fall file
347 2015-03-09 16:00  E6, 1501  Physics Colloquium : 2015 Spring file
346 2015-09-15 16:00  E6, 1501  Physics Colloquium : 2014 Fall file
345 2014-03-10 16:00  E6, 1501  Physics Colloquium : 2014 Spring file
344 2013-09-09 16:00  E6, 1501  Physics Colloquium : 2013 Fall
343 2013-03-11 16:00  E6, 1501  Physics Colloquium : 2013 Spring
342 2012-04-02 16:00  E6, 1501  A new route to ferroelectricity in magnetic spinels: a case of Co2MnO4
341 2012-02-13 16:00  E6, 1501  Physics Colloquium : 2012 Spring