visual
visual

세미나

  • HOME
  • >
  • 소식
  • >
  • 세미나

Bandgap Engineering of Black Phosphorus

2016.11.08 17:02

Physics 조회 수:5639

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)
574 2015-11-28 10:00    Electron Tunneling Spectroscopy of Single and Bilayer Graphene with Hexagonal Boron Nitride as Tunneling Barrier
573 2015-12-01 16:00    Introducing extra dimensions to spectroscopic studies of advanced quantum materials
572 2015-12-02 16:00    Samarium Hexaboride: Is it a Topological insulator?
571 2015-12-03 16:00    Hybrid solid state spin qubits in wide bandgap semiconductors
570 2015-12-09 11:00    Functional Imaging & Monitoring of Brain & Breast with Diffuse Light
569 2015-12-09 14:00    SWELLABLE COLLOIDAL PARTICLES ARE SWELL
568 2015-12-11 13:30    Quantum spin liquid in the 1/3 depleted triangular lattice Ba3(Ru1-xIrx)Ti2O9
567 2015-12-11 15:45    Dynamical mean field theory studies on heavy fermion system
566 2015-12-17 11:00    Wavefront engineering for in-vivo Deep brain imaging
565 2016-01-11 16:00    Mott Physics in the Strong Spin-Orbit Coupling Regime
564 2016-01-26 14:00    Electrochemistry on Nano- and Atomic Levels: Scanning Probe Microscopy Meets Deep Data
563 2016-03-07 16:00    Physics Colloquium : 2016 Spring file
562 2016-03-11 13:30    Physics Seminar Serises : 2016 Spring file
561 2016-03-11 13:30    Topological phases of matter in nonequilibrium: Topology of the Wannier-Stark ladder
560 2016-03-11 16:00    Jan. Switching handedness of of chiral solitons in Z4 topological insulators
559 2016-04-01 14:30    Interference of single charged particles without a loop and dynamic nonlocality
558 2016-04-01 16:15    Cotunneling drag effect in Coulomb-coupled quantum dots
557 2016-04-04 09:30    Radio frequency engineering
556 2016-04-05 16:00    A new impurity solver for multi-orbital systems: adaptive truncation of the Hilbert space
555 2016-04-06 15:30    Superconducting Quantum Interference Devices for Precision Detection