Pseudogap in surface-doped black phosphorus
2021.06.04 16:24
장소 | Online seminar |
---|---|
일시 | Jun. 11 (Fri.), 04:00 PM |
연사 | Dr. Keun Su Kim(Yonsei University) |
SRC Seminar
“Pseudogap in surface-doped black phosphorus”
Dr. Keun Su Kim
Department of Physics, Yonsei University
Jun. 11 (Fri.), 04:00 PM
Online seminar
https://kaist.zoom.us/j/89283252628
회의 ID: 892 8325 2628
암호: 916514
Abstract:
Many of the interesting quantum phenomena arise at the interface between a crystalline insulator and disordered dopants. In this kind of the interface between black phosphorus and alkali metals, we have studied the tunable band gap1, topological phase transition2, and the evolution of quantum phases (or pseudospin)3. After briefly summarizing the past results, I will introduce our recent discovery of a pseudogap in black phosphorus doped by various alkali metals4. With angle-resolved photoemission spectroscopy (ARPES), we reveal an anomalous band dispersion of back-bending and pseudogap, which can be explained by the Anderson-McMillan band dispersion of liquid metals developed in 1960s. This is a natural consequence of resonance scattering by dopant ions with only short-range order (or liquid order). The depth of a scattering potential tuned by different kinds of alkali metal (Na, K, Rb, and Cs) allows us to classify the pseudogap of p-wave and d-wave resonance.
References
1. J. Kim et al., Science 349, 723 (2015)
2. J. Kim et al., Phys. Rev. Lett. 119, 226801 (2017)
3. S. W. Jung, S. H, Ryu, W. J. Shen et al., Nature Mater. 19, 277 (2020)
4. S. H. Ryu, M. Huh, D. Y. Park et al., Nature, accepted (2021)
Contact: SunYoung Choi, (sun.0@kaist.ac.kr)
Center for Quantum Coherence in Condensed Matter, KAIST
댓글 0
번호 | 일시 | 장소 | 연사 | 제목 |
---|---|---|---|---|
296 | 2015/12/17, 11:00AM | E4(KI Building), Matrix Hall (2nd fl.) | Dr. Jung-Hoon Park (Purdue University) | Wavefront engineering for in-vivo Deep brain imaging |
295 | Oct. 18 (Tue.), 3PM | E6-2. 1st fl. #1323 | Dr. JunHo Suh, Korea Research Institute of Standards and Science | “Hybrid quantum systems with mechanical oscillators” |
294 | Jul. 08 (Fri.) 2PM | #1323(E6-2. 1st fl.) | Dr. Junhyun Lee, Harvard University | Electronic quasiparticles in the quantum dimer model |
293 | 2015/11/24, 4PM | E6-2, #1323 | Dr. Kab-Jin Kim (Institute for Chemical Research, Kyoto University, Japan) | Topology-based understanding of spin dynamics in inhomogeneously magnetized systems |
292 | Apr. 1(Fri.), 04:00 PM | Zoom webinar | Dr. Kayoung Lee (KAIST) |
High-field Electron Transport and Interaction Induced Phenomena in 2D Materials
![]() |
291 | November 29 (Thu.), 16:00 PM | #1323, E6-2 | Dr. Kee suk Hong |
양자 칸델라 실현을 위한 단일 광자 발생장치 개발
![]() |
» | Jun. 11 (Fri.), 04:00 PM | Online seminar | Dr. Keun Su Kim(Yonsei University) |
Pseudogap in surface-doped black phosphorus
![]() |
289 | Nov. 11th(Fri), 1:30 p.m. | #1323(E6-2. 1st fl.) | Dr. Keun Su Kim, POSTECH | Bandgap Engineering of Black Phosphorus |
288 | Apr. 01 (Fri.) 2:30 PM | E6-2. 1st fl. #1501 | Dr. KICHEON KANG, Chonnam National University | Interference of single charged particles without a loop and dynamic nonlocality |
287 | May 31 (Tue.) 4 PM | #1323(E6-2, 1st fl.) | Dr. Kimin Kim, KAIST | Understanding 3D tokamak physics towards advanced control of toroidal plasma |
286 | May. 11 (Fri.), 02:30 PM | E6-2. 1st fl. #1323 | Dr. Kun Woo Kim |
Disordered Floquet topological insulators
![]() |
285 | Dec. 9(Fri), 4p.m. | #1323(E6-2. 1st fl. | Dr. Kun Woo Kim, KIAS | Shift Charge and Spin Photocurrents in Dirac Surface States of Topological Insulator |
284 | May. 13 (Fri.), 02:30 PM | Zoom webinar | Dr. Kun-Rok Jeon(Department of Physics, Chung-Ang University) |
Topological Superconducting Spintronics Towards Zero-Power Computing Technologies
![]() |
283 | 7월 29일(목) 오후 2시 ~ 오후 4시 | Online seminar | Dr. Kunio Kaneta(KIAS) |
Gravitationally Induced Dark Sector and Inflationary Dynamics
![]() |
282 | 2015/12/11, 1:30PM | E6-2, #1323 | Dr. KwangYong Choi (Chung-Ang University) | Quantum spin liquid in the 1/3 depleted triangular lattice Ba3(Ru1-xIrx)Ti2O9 |
281 | 2016/03/11 1:30 PM | E6-2. 1st fl. #1501 | Dr. Kwon Park | Topological phases of matter in nonequilibrium: Topology of the Wannier-Stark ladder |
280 | November 1 (Thu.), 16:00 PM | #1323, E6-2 | Dr. KyeoReh Lee |
Direct holography from a single snapshot
![]() |
279 | 2015/07/16, 4PM | E6-2, 1318 | Dr. Kyunghan Hong(MIT) | Next-generation ultrafast laser technology for nonlinear optics and strong-field physics |
278 | October 26 (Fri.), 4:00 PM | #1323, E6-2 | Dr. Kyusung Hwang |
Coexisting triple-point and nodal-line topological magnons and thermal Hall effect in pyrochlore iridates
![]() |
277 | Mar. 24 (Fri.), 2:30 PM | #1323 (1st fl. E6-2). | Dr. MahnSoo Choi | Topological Dynamics |