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)
486 2023-02-20 17:00    (Optics Seminar) Neural Holography for Next generation Virtual and Augmented Reality Displays file
485 2024-03-20 16:00    [High-Energy Theory Seminar] Black hole states at finite N
484 2024-01-03 11:00    Interplay of Strong Correlations, Topology, and Disorder in 2D Quantum Matters
483 2023-09-13 16:00    [High Energy Theory Seminar] Cosmic Birefringence from Dark Photon
482 2022-06-23 11:00    JILA’s search for the electron’s Electric Dipole Moment (eEDM) to probe physics beyond the standard model file
481 2022-01-11 15:00    Ultrafast optical studies on CDW collective modes of the Weyl-CDW (TaSe4)2I file
480 2024-01-16 14:00    Dimer Physics and Superconductivity in La3Ni2O7
479 2020-02-20 16:00    Unconventional superconductivity in the locally non-centrosymmetric heavy-fermion CeRh2As2 file
478 2023-12-19 16:00    [High Energy Theory Seminar] Non-invertible symmetries, leptons, quarks, and why multiple generations
477 2022-12-13 11:00    Art of thin film engineering toward topological quantum computation file
476 2016-09-29 16:00    2016 Fall, Physics Seminar Serises file
475 2023-01-11 11:00    Directly proving magnetoelastic coupling in a soft ferromagnet using Lorentz 4D-STEM file
474 2021-11-02 16:00    Metrology of Band Topology via Resonant Inelastic X-ray Scattering file
473 2015-07-16 16:00    KAIST Physics Distinguished Lecture
472 2017-11-28 16:00    Physics after the lab and the desk: Your work in PRL file
471 2025-03-11 12:00  Rak-Kyeong Seong (UNIST)  The AI Revolution for Quantum Fields and Strings: A Case Study
470 2022-04-15 11:00    (응집물리 세미나) First-principles studies of polar oxides and their applications file
469 2017-04-27 16:00    반도체 양자점을 이용한 단광자 광원
468 2019-09-18 16:00    Exploring Synthetic Quantum Matter in Superconducting Circuits file
467 2019-07-25 16:00    Band topology of twisted bilayer graphene file