visual
visual

세미나

  • HOME
  • >
  • 소식
  • >
  • 세미나

Pseudogap in surface-doped black phosphorus

2021.06.04 16:24

admin 조회 수:2050

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
266 2019-10-25 15:00  #1323, E6-2  Physics Seminar file
265 2019-10-17 16:00  #1323, E6-2  Top down manipulation of Waves : From Metamaterials, Correlated Disorder, Quantum Analogy, to Digital Processing file
264 2019-10-16 16:00  #1323 (E6-2, 1st fl.)  Emergent black holes and monopoles from quantum fields file
263 2019-10-15 16:00  #1323, E6-2  Moiré superlattices and graphene quasicrystal file
262 2019-09-27 16:00  E6-2. 1st fl. #1323  0D/1D/2D/3D III-V materials grown by MBE for Optelectronics file
261 2019-09-27 14:30  E6-2. 1st fl. #1323  Spin-charge conversion in topological insulators for spintronic applications file
260 2019-09-26 16:00  #1323, E6-2  Entanglement Swapping with Autonomous Polarization-Entangled Photon-Pairs from Warm Atomic Ensemble file
259 2019-09-18 16:00  #1323, E6-2  Exploring Synthetic Quantum Matter in Superconducting Circuits file
258 2019-09-18 16:00  Seminar Room #1323  Fall 2019: Physics Seminar Serises file
257 2019-09-10 15:00  E6-2. 1st fl. #1323  Two-Stage Kondo Effect file
256 2019-09-10 15:00  #2502, E6-2  (2+1) D Duality Web from 3D Euclidean Lattice file
255 2019-09-02 16:00  Seminar Room 1501  Fall 2019: Physics Colloquium file
254 2019-08-27 16:00  Rm. 1323, E6  Critical current properties of Fe-based superconductors file
253 2019-08-22 16:00  #1323, E6-2  Physics and Applications in Nanoelectronics and Nonomechanics file
252 2019-08-19 10:00  Rm. 1322, E6-2  Tutorials on Multimode Quantum Optics in the Continuous Variable Regime file
251 2019-08-16 14:00  E6 Room(#1323)  Multiferroic and Magnetoelectric Effects by Tailoring Interfacial Chemistry and Physics in Correlated Oxides file
250 2019-08-14 16:00  Rm. 1323, E6  Quantum Optics, at the heart of quantum metrology and quantum information file
249 2019-08-06 16:00  E6 Room(#1323)  Visualization of in-plane piezoresponse vector fields file
248 2019-08-01 14:00  E6 Room(#1323)  Low-density Superconductivity in SrTiO3 Probed by Planar Tunneling Spectroscopy file
247 2019-07-31 16:00  E6-2, #1323  Features of ballistic superconducting graphene file