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
171 2022-04-25 16:00  E6, #1501  Ultrafast electron beam, a tool to explore the nanoscopic world of materials(우리말강의)
170 2022-04-28 16:00  E6 1323  (광학분야 특별세미나)Adiabaticity and symmetry in optical waveguide design
169 2022-05-02 16:00  E6, #1501  What can we learn from the history of science and technology?(우리말강의)
168 2022-05-09 16:00  E6, #1501  Searching for new electronic properties in correlated material flatland
167 2022-05-10 16:00  E6 1323  (광학분야 특별세미나)Testing quantum thermodynamics using quantum optics
166 2022-05-11 16:00  E6-2. #1323 & Zoom  Gravity as a phenomenon in quantum dynamics
165 2022-05-12 16:00  E6-2. #1323 & Zoom  New frontiers of electroweak physics at the LHC
164 2022-05-13 14:30  Zoom webinar  Topological Superconducting Spintronics Towards Zero-Power Computing Technologies file
163 2022-05-13 16:00  자연과학동(E6-2) 1st fl. #1323  High-fidelity iToffoli gate for fixed-frequency superconducting qubits file
162 2022-05-16 16:00  E6, #1501  Design synthetic topological matter with atoms and lights
161 2022-05-18 16:00  E6-2. #1323 & Zoom  Geometry, Algebra, and Quantum Field Theory
160 2022-05-19 15:00  online  (광학분야 특별세미나)Development of a multimodal optical system for improved disease diagnosis
159 2022-05-19 15:00  online  (광학분야 특별세미나)Development of a multimodal optical system for improved disease diagnosis
158 2022-05-19 16:00  E6-2. #1323 & Zoom  Chasing Long Standing Neutrino Anomalies with MicroBooNE
157 2022-05-20 11:00  E6-1 #1323  (응집물리 세미나) Exploration of new polymorphs in van der Waals crystals
156 2022-05-23 16:00  E6, #1501  Novel electronic transport in topological van der Waals magnets
155 2022-05-25 14:00  E6 Room(#2501)  Atomic-level insights into ferroelectric switching and preferred orientation of ultrathin hafnia file
154 2022-05-25 16:00  E6-2. 1st fl. #1323 / Zoom  Uncovering New Lampposts for Dark Matter: Continuum or Conformal
153 2022-05-26 16:00  E6 1323  (광학분야 특별세미나)Topological photonic devices
152 2022-05-27 11:00  Online seminar  Current Status and Future Plans of ADMX file