visual
visual

세미나

  • HOME
  • >
  • 소식
  • >
  • 세미나

Pseudogap in surface-doped black phosphorus

2021.06.04 16:24

admin 조회 수:7348

날짜 2021-06-11 16:00 
연사  
장소 Online seminar 

 

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 연사 제목
공지 2025-02-24 16:00    2025년 봄학기 콜로키움 안내
공지 2025-02-27 16:00    2025년 봄 물리학과 특별세미나 (광학/응집물리 분야)
505 2022-01-26 13:00    An Introduction to Cohomology groups file
504 2018-10-12 16:00    Direct observation of a two-dimensional hole gas at oxide interfaces file
503 2022-11-18 14:30    Kondo cloud condensation in a highly-doped semiconductor metal file
502 2025-05-01 16:00  Dr. Inwook Kim (Lawrence Livermore National Laboratory)  BSM Physics Search with Quantum Sensors file
501 2018-12-26 16:00    Brane-like defect in 3D toric code file
500 2019-07-31 16:00    Features of ballistic superconducting graphene file
499 2018-07-12 17:00    The MilliQan Experiment: Search for Milli-Charged Particles at the LHC
498 2016-12-09 13:30    Entanglement area law in strongly-correlated systems
497 2023-11-23 16:00    Deciphering the Enigma of Quantum Materials by X-ray Scattering and Spectroscopy
496 2019-10-16 16:00    Emergent black holes and monopoles from quantum fields file
495 2022-07-14 13:30    Electronic structure and anomalous transport properties of topological materials by first principle calculation
494 2016-11-24 16:00    Harmonic oscillator physics with single atoms in a state-selective optical potential
493 2015-09-07 15:00    Advanced Optical Materials and Devices at NRL
492 2021-05-14 16:00    Spatial and temporal separation of environmental dephasing sources from solid-state quantum emitters file
491 2016-04-12 16:00    Confinement of Superconducting Vortices in Magnetic Force Microscopy
490 2017-04-28 14:30    Hot electron generation at surfaces and its impact to catalysis and renewable energy conversion
489 2015-12-11 15:45    Dynamical mean field theory studies on heavy fermion system
488 2023-10-19 11:00    Emergent functionalities of iridium oxide films with different growth orientation file
487 2023-06-26 11:00    Quantum computing on magnetic racetracks with flying domain wall qubits
486 2019-04-19 11:00    First-principles studies of semiconductors for solar cell applications file