visual
visual

세미나

  • HOME
  • >
  • 소식
  • >
  • 세미나

Bandgap Engineering of Black Phosphorus

2016.11.08 17:02

Physics 조회 수:984

장소 #1323(E6-2. 1st fl.) 
일시 Nov. 11th(Fri), 1:30 p.m. 
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 일시 장소 연사 제목
127 May 1 (Wed), 4:00 PM  #1323, E6-2  Dr. Sungkyun Choi  Raman and x-ray scattering study on correlated electron systems: two case examples file
126 May 11 (Wed.), 4 PM  E6-2. #1323(1st fl.)  Dr. Bumjoon Kim, Max Planck Institute for Solid State Research  The quest for novel high-temperature superconductors---Prospects and progress in iridates
125 May 13 (Fri.) 4 PM  E6. #1501(1st fl.)  Dr. Hosub Jin, Dept. of Physics, UNIST  Graphene analogue in (111)- BaBiO3 bilayer heterostructures for topological electronics
124 May 13 (Fri.), 1:30 PM  E6. #1501(1st fl.)  Dr. Young-Woo Son, Dept. of Physics, KIAS  Aperiodic crystals in low dimensions
123 May 16, 2016 (Mon) 4PM  #1323(E6-2, 1st Fl.)  Dr. Daniel Bowring , Fermi National Accelerator Laboratory  Tuning microwave cavities with biased nonlinear dielectrics for axion searches
122 May 19 (Thu) 4PM  #1323(E6-2, 1st fl.)  Dr. Heedeuk Shin, POSTECH  Nonlinear/quantum optical effect in silicon nano-photonics
121 May 19, 2016 (Thur.) 3PM  May 19, 2016 (Thur.) 3PM,  Dr. Michael Betz, CERN  The CERN Resonant WISP Search: Development, Results and Lesson-Learned
120 May 2 (Thu.), 4:00 PM  #1323, E6-2  Prof. Joon Ik Jang  Anomalous optical properties of halide perovskites file
119 May 21 (Tue.), 4:00 PM  #5318, E6-2  임준원 박사  Classification of flat bands according to the band-crossing singularity of Bloch wave functions file
118 May 24 (Fri.), 16:00 PM  #1323, E6-2  Prof. Soonjae Moon  Infrared spectroscopy study on metal-insulator transitions in layered perovskite iridates file
117 May 24 (Tue) 4 PM  E6-2. #1323(1st fl.)  Dr. Euyheon Hwang, SKKU Advanced Institute of Nanotechnology, Sung Kyung Kwan University  Electronic and magnetic properties of 2D transition-metal thiophosphates and tunability of magnetic order with carrier density
116 May 29 (Tue.), 04:00 PM  #1323, E6-2  Prof. Jae-Won Jang  Investigation on metal nanostructure/semiconductor junction and its applications file
115 May 30 (Thu.), 16:00 PM  #1323, E6-2  Prof. Chang-Hee Cho  Tuning the excitonic properties of semiconductors with light-matter interactions file
114 May 31 (Fri.), 11:00 AM  #1323, E6-2  Prof. Guido Burkard  Cavity QED with Spin Qubits file
113 May 31 (Tue.) 4 PM  #1323(E6-2, 1st fl.)  Dr. Kimin Kim, KAIST  Understanding 3D tokamak physics towards advanced control of toroidal plasma
112 May 311 (Thu.), 04:00 PM  #1323, E6-2  Prof. Teun-Teun Kim  Dynamic control of optical properties with gated-graphene metamaterials file
111 May. 8th (Wed), 16:00  E6 Room(#1323)  Jieun Lee  Imaging valley dependent electron transport in 2D semiconductors file
110 May 9 (Thu.), 16:00 PM  #1323, E6-2  Prof. Kwang Geol Lee  Quantum Optical Sensing Using Single Photons And Single Photon Emission from Single Emitters file
109 May 9 (Thu.), 16:00 PM  #1323, E6-2  Prof. Kwang Geol Lee  Quantum Optical Sensing Using Single Photons And Single Photon Emission from Single Emitters file
108 May 9 (Wed.), 04:00 PM  #1323, E6-2  Prof. Jong-Soo Rhyee  Recent advances in thermoelectric bulk composites file