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
446 2022-03-28 16:00  E6, #1501  Ultimate-density atomic semiconductor via flat bands
445 2022-03-07 16:00  E6, #1501  Climate Physics and Modelling(우리말강의)
444 2022-05-19 15:00  online  (광학분야 특별세미나)Development of a multimodal optical system for improved disease diagnosis
443 2022-05-19 15:00  online  (광학분야 특별세미나)Development of a multimodal optical system for improved disease diagnosis
442 2022-04-11 16:00  E6, #1501  Emergence of Statistical Mechanics in Quantum Systems
441 2022-04-25 16:00  E6, #1501  Ultrafast electron beam, a tool to explore the nanoscopic world of materials(우리말강의)
440 2022-04-04- 16:00  E6, #1501  New paradigms in Quantum Field Theory
439 2022-05-10 16:00  E6 1323  (광학분야 특별세미나)Testing quantum thermodynamics using quantum optics
438 2022-04-14 16:00  E6 1323  (광학분야 특별세미나)Holographic tomography of dielectric tensors at optical frequency
437 2022-05-26 16:00  E6 1323  (광학분야 특별세미나)Topological photonic devices
436 2022-04-28 16:00  E6 1323  (광학분야 특별세미나)Adiabaticity and symmetry in optical waveguide design
435 2022-03-31 16:00  online  (광학분야 특별세미나)Ultrafast time-resolved spectroscopy in topological materials
434 2016-09-21 16:00  E6-2. #2502(2nd fl.)  Entanglement probe of two-impurity Kondo physics
433 2016-04-18 15:30  KI빌딩(E4), 강의실 B501 (5F)  First Principles Approaches for Intermolecular Interactions: From Gas-Phase Dimers to Liquid Water and Molecular Crystal Polymorphism file
432 2022-05-02 16:00  E6, #1501  What can we learn from the history of science and technology?(우리말강의)
431 2022-05-23 16:00  E6, #1501  Novel electronic transport in topological van der Waals magnets
430 2022-05-30 16:00  E6, #1501  Light manipulation using 2D layered semiconductors
429 2022-05-09 16:00  E6, #1501  Searching for new electronic properties in correlated material flatland
428 2022-05-16 16:00  E6, #1501  Design synthetic topological matter with atoms and lights
427 2016-05-17 11:00  창의학습관(E11), 406호  The CERN Resonant WISP Search: Development, Results and Lesson-Learned