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
526 2009-02-23 16:00  E6, 1501  Physics Colloquium : 2009 Spring file
525 2009-09-07 16:00  E6, 1501  Physics Colloquium : 2009 Fall file
524 2009-10-21 16:00  E6, 1501  Interdimensional Universality of Dynamic Interfaces
523 2010-02-08 16:00  E6, 1501  Physics Ciolloquium : 2010 Spring file
522 2010-02-14 16:00  E6, 1501  Physics Colloquium - 2011 Spring file
521 2010-09-06 16:00  E6, 1501  Physics Colloquium : 2010 Fall file
520 2011-05-16 16:00  E6, 1501  Photonics with surface plasmon polaritons
519 2011-09-03 16:00  E6, 1501  Physics Colloquium : 2011 Fall file
518 2012-02-13 16:00  E6, 1501  Physics Colloquium : 2012 Spring
517 2012-04-02 16:00  E6, 1501  A new route to ferroelectricity in magnetic spinels: a case of Co2MnO4
516 2013-03-11 16:00  E6, 1501  Physics Colloquium : 2013 Spring
515 2013-09-09 16:00  E6, 1501  Physics Colloquium : 2013 Fall
514 2014-03-10 16:00  E6, 1501  Physics Colloquium : 2014 Spring file
513 2014-05-28 17:00  KI Building, Matrix Hall  부품소재산업이 미래다
512 2014-12-22 14:00  E6, Rm1319  Dynamics of molecular motors: Power stroke vs Brownian ratchet file
511 2015-03-04 12:00  1323호, E6-2  Bioimaging and Biosensing Using Near-Infrared Fluorescence file
510 2015-03-09 16:00  E6, 1501  Physics Colloquium : 2015 Spring file
509 2015-03-13 14:00  Connect Room, KI Bldg.  The 15th Innovative Workshop on Soft/Bio Materials file
508 2015-06-03 12:00  Room 101, E11  The First Wednesday Multidisciplinary Forum file
507 2015-07-15 14:00  E6-2,1323  Electronic and optical properties of titanate-based oxide superlattices