Topological Dirac line nodes in centrosymmetric semimetals
2015.11.04 17:14
| 장소 | E6-2, #5318 |
|---|---|
| 일시 | 2015/11/06, 4:30 PM |
| 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)
댓글 0
| 번호 | 일시 | 장소 | 연사 | 제목 |
|---|---|---|---|---|
| 공지 | 2019/09/18 - 12/5 | Seminar Room #1323 | Prof. David Schuster and etc. | Fall 2019: Physics Seminar Serises |
| 공지 | 2019/09/02 - 12/09 | Seminar Room 1501 | 이호성 박사 (한국표준과학연구원) and etc. | Fall 2019: Physics Colloquium |
| 154 | 2016/03/11 4 PM | E6-2. 1st fl. #1501 | Dr. Tae-Hwan KIM (POSTECH) | Jan. Switching handedness of of chiral solitons in Z4 topological insulators |
| 153 | Apr. 2 (Fri.), 02:30 PM | Online(Zoom) | Dr. Tae Hyun Kim (SNU) | Quantum computing and entanglement generation using trapped ions and photons |
| 152 | May. 14 (Fri.), 02:30 PM | Online seminar | Dr. Suyong Jung(KRISS) |
Electrically tunable spin valve effect in vertical van-der-Waals magnetic tunnel junctions
 |
| 151 | 2015/11/28, 10AM | E6-2, #1323 | Dr. Suyong Jung (Korea Research Institute of Standards and Science) | Electron Tunneling Spectroscopy of Single and Bilayer Graphene with Hexagonal Boron Nitride as Tunneling Barrier |
| 150 | May 1 (Wed), 4:00 PM | #1323, E6-2 | Dr. Sungkyun Choi |
Raman and x-ray scattering study on correlated electron systems: two case examples
|
| 149 | April 13 (Fri.), 10am | #1323 (E6-2, 1st fl.) | Dr. Sungkun Hong |
Quantum meets Mechanics: from Quantum Information to Fundamental Research
|
| 148 | Nov. 3 (Fri.), 4:00 PM | #1323 (1st fl., E6-2.) | Dr. SungDae Ji (Max Planck POSTECH/Hshinchu Center (MPK)) |
Expedition to the Kitaev Quantum Spin Liquid: Hunting for Majorana fermions
|
| 147 | Nov. 29(Tue) 4p.m. | #1323(E6-2. 1st fl.) | Dr. SungBin Lee, KAIST | Symmetry Protected Kondo Metals and Their Phase Transitions |
| 146 | Oct. 07 (Fri), 1:30 PM | E6-2. #1323(1st fl.) | Dr. Suk Bum Chung, IBS-CCES , Seoul National University | “Symmetry and topology in transition metal dichalcogenide?” |
| 145 | April 26 (Fri.), 4:00 PM | #1323, E6-2 | Dr. Soonwon Choi |
Robust Quantum Metrology using Strongly Interacting Spin Ensembles and Quantum Convolutional Neural Network
|
| 144 | November 5 (Tue.), 4:00 PM | #1323, E6-2 | Dr. Shik Shin |
Study on nanomaterials by the development of ultrahigh resolution laser-photoelectron microscopy (PEEM)
|
| 143 | November 20 (Wed.), 4:00 PM | #5302, E6-2 | Dr. Shigeyuki Ishida |
Correlation between superconducting transition temperature and critical current density in irradiated iron-based superconductors
|
| 142 | February 13th (Thur.), 16:30 PM | E6-6, #119 | Dr. Seyoon Kim(University of Wisconsin-Madison) |
Enhanced Light-Matter Interactions in Graphene with Noble Metal Plasmonic Structures
|
| 141 | October 31 (Thu.), 10:00am | #1323 (E6-2, 1st fl.) | Dr. Seung-Sup Lee |
Kondo meets Hubbard: Impurity physics for correlated lattices
|
| 140 | Apr. 09 (Mon.), 11:00 AM | E6-2. 1st fl. #1323 | Dr. Seung-Sup B. Lee |
Doublon-holon origin of the subpeaks at the Hubbard band edges
|
| 139 | October 29 (Tue.), 4:00pm | #1323 (E6-2, 1st fl.) | Dr. Seung-Joo Lee |
Particles and Gravity via String Geometry
|
| 138 | Jun. 01 (Fri.), 11:00 AM | E6-2. 1st fl. #1323 | Dr. Seung Sae Hong |
Topological phases in low-dimensional quantum materials
|
| 137 | Mar. 29 (Fri.), 02:30 PM | E6-2. 1st fl. #1323 | Dr. Seung Hyub Baek |
Epitaxial Multifunctional Oxide Thin Films for Novel Electronics
|
| 136 | 2016/1/26, 2PM | E6-2, #1323 | Dr. Sergei V. Kalinin (Center for Nanophase Materials Sciences, Oak Ridge National Laboratory) | Electrochemistry on Nano- and Atomic Levels: Scanning Probe Microscopy Meets Deep Data |
| 135 | Apr. 19 (Fri.), 04:00 PM | E6-2. 1st fl. #1323 | Dr. Seok Kyun Son |
Graphene and hBN heterostructures
|