visual
visual

세미나

  • HOME
  • >
  • 소식
  • >
  • 세미나

Bandgap Engineering of Black Phosphorus

2016.11.08 17:02

Physics 조회 수:5668

날짜 2016-11-11 13:30 
연사  
장소 #1323(E6-2. 1st fl.) 

Bandgap Engineering of Black Phosphorus

 

Nov. 11th(Fri), 1:30 p.m. #1323(E6-2. 1st fl.)
Dr. Keun Su Kim, POSTECH

 

Two-dimensional (2D) atomic crystals have emerged as a class of materials that may impact our future electronics technology. A key issue is controlling their electronic state to overcome the limit of natural properties. Black phosphorus is an emergent 2D atomic crystal that is attracting growing interest owing to its promising device characteristics1. In this talk, I will introduce our recent angle-resolved photoemission spectroscopy studies on the widely tunable bandgap of black phosphorus. The in-situ deposition of alkali-metal atoms on the surface of black phosphorus produces strong vertical electric field, modulating the bandgap from a narrow-gap semiconductor to a zero-gap semimetal2. At the critical point of this semiconductor-semimetal transition, black phosphorus is an unusual zero-gap semimetal, whose band dispersion is highly anisotropic, linear in armchair and quadratic in zigzag directions2. I will also briefly discuss about the future direction of this emerging field.


References
1. X. Ling et al., PNAS 112, 4523 (2014).
2. J. Kim et al., Science 349, 723 (2015).

 

Contact: MyungJoon Han, Physics Dept., (mj.han@kaist.ac.kr)

 

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)
545 2023-04-28 11:00    Tkachenko wave: From the modern field theory viewpoint
544 2018-10-18 10:00    Understanding membrane protein folding using single-molecule force techniques file
543 2023-07-19 16:00    [High-Energy Theory Seminar]Deriving the Simplest Gauge-String Duality
542 2023-03-02 11:00    Probing Anomalies of Non-Invertible Symmetries with Symmetry TFTs
541 2020-07-02 16:00    An irreversible qubit-photon coupling for the detection of itinerant microwave photons file
540 2015-08-04 11:00    Propagation of ultrasound through two- and three-dimensional strongly scattering media
539 2016-07-07 14:00    Let there be topological superconductors
538 2017-09-22 13:00    Superconductor-metal-insulator transition in thin Tantalum films file
537 2017-06-02 14:30    Quasiparticle Interference and Fourier transform scanning tunneling spectroscopy in WTe2 (Weyl semimetal) file
536 2016-05-24 16:00    Electronic and magnetic properties of 2D transition-metal thiophosphates and tunability of magnetic order with carrier density
535 2023-06-14 16:00    [CAPP seminar] EMC at CERN file
534 2023-06-15 16:00    [CAPP Seminar] Cryogenic electronics for ion traps file
533 2016-04-04 09:30    Radio frequency engineering
532 2016-11-1 10:30    Time scale dependent dynamics in InAs/InP quantum dot gain media
531 2018-10-25 16:00    Abelian and non-Abelian dark photons file
530 2024-08-14 11:00    Pair Density Waves and Supercurrent Diode Effect in Altermagnets
529 2017-09-22 16:00    Unexpected Electron-Pairing in Integer Quantum Hall Effect file
528 2017-09-22 14:30    Quantum Electronic Transport in Graphene Hybrid Nanostructures file
527 2024-05-14 16:00    [High Energy Theory Seminar] Minimal Production of Prompt Gravitational Waves during Reheating.
526 2018-12-07 14:30    Spin generation from heat and light in metals file