visual
visual

세미나

  • HOME
  • >
  • 소식
  • >
  • 세미나

Bandgap Engineering of Black Phosphorus

2016.11.08 17:02

Physics 조회 수:1659

날짜 2016-11-11 13:30 
일시 Nov. 11th(Fri), 1:30 p.m. 
장소 #1323(E6-2. 1st fl.) 
연사 Dr. Keun Su Kim, POSTECH 

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 장소 제목
162 2019-11-01 14:30  E6-2. 1st fl. #1323  Squeezing the best out of 2D materials file
161 2018-12-07 16:00  E6-2. 1st fl. #1323  Novel probes of interacting electrons in 2D systems file
160 2018-06-01 11:00  E6-2. 1st fl. #1323  Topological phases in low-dimensional quantum materials file
159 2016-10-18 15:00  E6-2. 1st fl. #1323  “Hybrid quantum systems with mechanical oscillators”
158 2017-09-22 16:00  E6-2. 1st fl. #1323  Unexpected Electron-Pairing in Integer Quantum Hall Effect file
157 2019-09-27 16:00  E6-2. 1st fl. #1323  0D/1D/2D/3D III-V materials grown by MBE for Optelectronics file
156 2018-05-17 13:30  E6-2. 1st fl. #1323  Quantum Spin Liquid in Kitaev Materials file
155 2018-11-09 16:00  E6-2. 1st fl. #1323  Quantum sensing and imaging with diamond defect centers for nano-scale spin physics file
154 2018-12-27 16:00  E6-2. 1st fl. #1323  Quantum Innovation (QuIN) Laboratory file
153 2016-04-12 16:00  E6-2. 1st fl. #1323  Confinement of Superconducting Vortices in Magnetic Force Microscopy
152 2018-11-09 14:30  E6-2. 1st fl. #1323  Moiré superlattices – from twisted bilayer graphene to quasicrystal file
151 2017-04-28 14:30  E6-2. 1st fl. #1323  Hot electron generation at surfaces and its impact to catalysis and renewable energy conversion
150 2018-12-11 16:00  E6-2. 1st fl. #1323  Natural compact representation of Matsubara Green’s functions: applications to analytic continuation and quantum many-body simulations file
149 2017-09-22 13:00  E6-2. 1st fl. #1323  Superconductor-metal-insulator transition in thin Tantalum films file
148 2018-10-12 14:30  E6-2. 1st fl. #1323  Quantum Advantage in Learning Parity with Noise file
147 2017-05-12 13:30  E6-2. 1st fl. #1323  Topological Dirac insulator
146 2017-09-22 14:30  E6-2. 1st fl. #1323  Quantum Electronic Transport in Graphene Hybrid Nanostructures file
145 2019-11-01 16:00  E6-2. 1st fl. #1323  Electron transport through weak-bonded contact metal with low dimensional nano-material file
144 2019-09-27 14:30  E6-2. 1st fl. #1323  Spin-charge conversion in topological insulators for spintronic applications file
143 2018-03-16 16:00  E6-2. 1st fl. #1323  Van der Waals Heterostructures from Quantum Transport to Ultrafast Optoelectronics file