visual
visual

세미나

  • HOME
  • >
  • 소식
  • >
  • 세미나

Pseudogap in surface-doped black phosphorus

2021.06.04 16:24

admin 조회 수:1407

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
공지 2022-10-24 16:00  E6 #1501(공동강의실)  Physics Colloquim(Fall 2022)
공지 2022-09-21 10:30  E6-1 #1501  [Update 세미나 영상] Distinguished Lecture 'The Magic of Moiré Quantum Matter' Prof. Pablo Jarillo-Herrero(Department of Physics, MIT)
공지 2022-11-11 11:00  E6-2 #1323  [Update 세미나영상] (응집물리 세미나) Honeycomb oxide heterostructures for quantum spin liquid
공지 2022-10-28 11:00  E6-2 #1323  [Update 세미나영상] (응집물리 세미나) Machine-Learning-Guided Prediction models and Materials discovery for high Tc cuprates
공지 2022-10-07 11:00  E6-2 #1323  [Update 세미나 영상] (응집물리 세미나) Competing orders in a vanadium-based kagome metal monolayer
공지 2022-09-23 11:00  E6-2 #1323  [Update 세미나 영상] (응집물리 세미나) Steady Floquet-Andreev states in graphene Josephson junctions
공지 2022-09-22 11:00  E6-1 #1323  2022 가을학기 응집물리 및 광학 세미나 전체 일정
375 2016-10-27 16:00  #1323(E6-2)  Terahertz Metal Optics
374 2022-10-27 16:00  E6-2 #1323  (광학분야 세미나) Cavity optomechanical systems for quantum transduction
373 2022-10-26 10:00  E6-2 #2502  Replica Higher-Order Topology of Hofstadter Butterflies in Twisted Bilayer Graphene
372 2019-10-25 15:00  #1323, E6-2  Physics Seminar file
371 2016-10-18 15:00  E6-2. 1st fl. #1323  “Hybrid quantum systems with mechanical oscillators”
370 2016-10-18 13:30  1st fl. #1323(E6-2)  "Visualization of oxygen vacancy in motion and the interplay with electronic conduction"
369 2016-10-17 11:00  #1323,(E6-2, 1st fl.)  IMS and examples of the studies on optoelectronic materials
368 2020-10-16 16:00  https://kaist.zoom.us/j/89198078609  Hidden room-temperature ferroelectricity in CaTiO3 revealed by a metastable octahedral rotation pattern file
367 2020-10-16 14:30  https://kaist.zoom.us/j/89198078609  Nanoscale magnetic resonance detection towards nano MRI file
366 2020-10-15 16:00  (https://kaist.zoom.us/j/93997220310)  Towards resource-efficient and fault-tolerant quantum computation with nonclassical light
365 2022-10-13 16:00  E6-2 #1323  (광학분야 세미나) Ultrafast Optics for Ultra-Precision Metrology and Realization of Flexible/Stretchable Laser-Induced-Graphene Electronics
364 2018-10-12 16:00  E6-2. 1st fl. #1323  Direct observation of a two-dimensional hole gas at oxide interfaces file
363 2018-10-12 14:30  E6-2. 1st fl. #1323  Quantum Advantage in Learning Parity with Noise file
362 2017-10-10 16:00  E6-2 #1323  Discovery of New 2D Materials with Diverse Physical Properties
361 2016-10-07 16:00  E6-2. #1323(1st fl.)  “Tilt engineering of 4d and 5d transition metal oxides?”
360 2016-10-07 13:30  E6-2. #1323(1st fl.)  “Symmetry and topology in transition metal dichalcogenide?”
359 2020-10-09 09:00  https://kaist.zoom.us/j/85161896513?pwd=U3pwWFFZaWVRamxDZUR5REhNeVk0UT09  Quantum Many-Body Simulation file
358 2020-10-23 14:00  E6-2 #1323  Plasmon spectroscopy of low-dimensional superconductors in fluctuating regime file
357 2018-11-08 16:00  #1323, E6-2  Conformality lost file