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 |
---|---|---|---|---|
342 | Oct 9 (Fri), 09:00 AM | https://kaist.zoom.us/j/85161896513?pwd=U3pwWFFZaWVRamxDZUR5REhNeVk0UT09 | Prof. Tim Hsieh (Perimeter Institute) |
Quantum Many-Body Simulation
![]() |
341 | Oct 23 (Fri.), 14:00 PM | E6-2 #1323 | Prof. Ivan Savenko (University of Science and Technology & IBS PCS) |
Plasmon spectroscopy of low-dimensional superconductors in fluctuating regime
![]() |
340 | November 8 (Thu.), 16:00 PM | #1323, E6-2 | 이종완 박사 |
Conformality lost
![]() |
339 | November 7 (Thu.), 16:00 PM | #1323, E6-2 | Prof. Je-Hyung Kim |
Integrated quantum photonics with solid-state quantum emitters
![]() |
338 | 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)
![]() |
337 | November 29 (Thu.), 16:00 PM | #1323, E6-2 | Dr. Kee suk Hong |
양자 칸델라 실현을 위한 단일 광자 발생장치 개발
![]() |
336 | November 28 (Thu.), 16:00 PM | #1323, E6-2 | Prof. Kyung Taec Kim |
Generation of coherent EUV emissions using ultrashort laser pulses
![]() |
335 | November 21 (Wed.), 15:00 PM | #1323, E6-2 | Prof. Seongshik Oh |
Engineering topological quantum physics at the atomic scale
![]() |
334 | 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
![]() |
333 | November 14 (Thu.), 16:00 PM | #1323, E6-2 | Prof. Ji-Hun Kang |
Semi-classical model of polariton propagation
![]() |
332 | November 1 (Thu.), 16:00 PM | #1323, E6-2 | Dr. KyeoReh Lee |
Direct holography from a single snapshot
![]() |
331 | Nov.26(Thu), 04:00PM | Online(Zoom) | Myung-Ki Kim | 2020 가을학기 광학분야 특별세미나(Light Engineering Beyond the Diffraction Limit) |
330 | Nov. 9 (Fri.), 04:00 PM | E6-2. 1st fl. #1323 | Dr. Donghun Lee |
Quantum sensing and imaging with diamond defect centers for nano-scale spin physics
![]() |
329 | Nov. 9 (Fri.), 02:30 PM | E6-2. 1st fl. #1323 | Dr. Pilkyung Moon |
Moiré superlattices – from twisted bilayer graphene to quasicrystal
![]() |
328 | Nov. 8 (Wed.), 1:00 PM | #5318 (E6-2. 5th fl.) | Prof. Y. Matsuda Department of Physics, Kyoto University |
“Emergent exotic quasiparticles in quantum spin liquids”
![]() |
327 | 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
![]() |
326 | Nov. 3 (Fri.), 2:30 PM | #1323 (1st fl., E6-2.) | Dr. MinChul Lee(Department of Applied Physics, Kyung Hee Univ.) |
Quantum Resistor-Capacitor Circuit with Majorana Edge States
![]() |
325 | Nov. 29(Tue) 4p.m. | #1323(E6-2. 1st fl.) | Dr. SungBin Lee, KAIST | Symmetry Protected Kondo Metals and Their Phase Transitions |
324 | Nov. 28 (Tue.), 4:00 PM | #1323 (E6-2. 1st fl.) | Samindranath Mitra, Editor at Physical Review Letters |
Physics after the lab and the desk: Your work in PRL
![]() |
323 | Nov. 24(Thu) 4p.m. | #1323(E6-2. 1st fl.) | Dr. Jai-Min Choi, Chonbuk National Univiersity | Harmonic oscillator physics with single atoms in a state-selective optical potential |