visual
visual

세미나

  • HOME
  • >
  • 소식
  • >
  • 세미나

Pseudogap in surface-doped black phosphorus

2021.06.04 16:24

admin 조회 수:2054

날짜 2021-06-11 16:00 
일시 Jun. 11 (Fri.), 04:00 PM 
장소 Online seminar 
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

 

번호 날짜 장소 제목
346 2022-12-20 16:00  E6-2.1st fl. #1323 & zoom  Studying Baryonic Flow Across the Cosmic Scales Using Radio and Millimeter Wavelength Experiments
345 2018-12-26 16:00  E6-1. 3rd fl. #3434  Informal Workshop on Topology and Correlation file
344 2018-12-26 16:00  E6-2. 1st fl. #1323  Brane-like defect in 3D toric code file
343 2018-12-27 16:00  E6-2. 1st fl. #1323  Quantum Innovation (QuIN) Laboratory file
342 2021-12-03 14:30  Zoom webinar  Topological Spin Textures: Skyrmions and Beyond file
341 2021-12-03 16:00  Zoom webinar  Nonequilibrium Heat Transport in Elemental Metals Probed by an Ultrathin Magnetic Thermometer file
340 2018-12-07 14:30  E6-2. 1st fl. #1323  Spin generation from heat and light in metals file
339 2018-12-07 16:00  E6-2. 1st fl. #1323  Novel probes of interacting electrons in 2D systems file
338 2022-12-07 16:00  E6-2 #1323  (광학분야 세미나) Non-Hermitian physics and non-Hermitian singularity
337 2016-12-8 16:00  #1323(E6-2. 1st fl.)  Dynamical Resonance between Two Optical Cavities via Optomechanical Oscillator
336 2022-12-09 11:00  E6-2 #1323  [Update 세미나영상](응집물리 세미나) Single-shot measurements of strongly-correlated artificial molecular levels in semiconductor quantum dots file
335 2016-12-09 13:30  #1323(E6-2. 1st fl.)  Entanglement area law in strongly-correlated systems
334 2016-12-09 16:00  #1323(E6-2. 1st fl.  Shift Charge and Spin Photocurrents in Dirac Surface States of Topological Insulator
333 2020-12-10 13:55  Zoom  Consistency of Boltzmann equation and light dark matter from inflaton decay
332 2020-12-23 10:00  Online  Online workshop for Quantitative Phase Imaging file
331 2020-12-09 10:00  Zoom  Searching for the QCD axion with the ARIADNE experiment file
330 2023-12-14 16:00  CAPP Seminar Room C303, Creation Hall, KAIST Munji Campus  Superconducting qubits for large-scale quantum computers file
329 2019-12-13 13:00  #2501, E6-2  Computational Material Designs: Current Status and Future Directions file
328 2019-12-13 13:30  #1323, E6-2  Biophysics Mini-symposium at KAIST file
327 2019-12-18 16:00  #1323, E6-2  Road to Higher Tc Superconductivity file