visual
visual

세미나

  • HOME
  • >
  • 소식
  • >
  • 세미나
날짜 2015-11-06 16:30 
연사  
장소 E6-2, #5318 

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 연사 제목
공지 2025-02-24 16:00    2025년 봄학기 콜로키움 안내
공지 2025-02-27 16:00    2025년 봄 물리학과 특별세미나 (광학/응집물리 분야)
446 2016-03-11 13:30    Topological phases of matter in nonequilibrium: Topology of the Wannier-Stark ladder
445 2018-11-01 16:00    Direct holography from a single snapshot file
444 2022-08-18 10:00    Disorder-driven phase transition in the second-order non-Hermitian skin effect
443 2023-04-27 11:00    Inverse Shapiro steps and coherent quantum phase slip in superconducting nanowires
442 2015-07-16 16:00    Next-generation ultrafast laser technology for nonlinear optics and strong-field physics
441 2018-10-26 16:00    Coexisting triple-point and nodal-line topological magnons and thermal Hall effect in pyrochlore iridates file
440 2017-03-24 14:30    Topological Dynamics
439 2015-10-15 10:00    Development of Large-Bore, High Field Magnets at the NHMFL
438 2023-06-22 16:00    [CAPP Seminar] The muon g-2 puzzle file
437 2016-05-19 15:00    The CERN Resonant WISP Search: Development, Results and Lesson-Learned
436 2016-07-08 11:00    Isostatic magnetism
435 2015-11-23 13:30    What's Beyond the Standard Model? Lessons from Run I and what might come in Run II
434 2017-02-01 14:00    Quantum electron optics using flying electrons
433 2019-09-10 15:00    Two-Stage Kondo Effect file
432 2017-11-03 14:30    Quantum Resistor-Capacitor Circuit with Majorana Edge States file
431 2019-07-30 16:00    Dirac fermions and flat bands in correlated kagome metals file
430 2023-07-11 11:00    Ordered phases, non-Fermi liquid, and quantum criticality driven by entanglement between multipoles and conduction electrons
429 2017-04-28 16:00    Carbon nanotubes coupled to superconducting impedance matching circuits
428 2016-09-29 16:00    Exploring the phase diagram of BaBiO3: epic voyage of just another bad trip?
427 2019-06-12 15:00    The relation between free and interacting fermionic SPT phases file