visual
visual

세미나

  • HOME
  • >
  • 소식
  • >
  • 세미나
장소 Online(Zoom) 
일시 Apr. 2 (Fri.), 04:00 PM 
연사 Dr. Heejun Yang (KAIST) 

 

SRC Seminar

 

 

 

 

 

Van der Waals heterostructures for orbital gating-based phototransistors and electronic spectroscopy

 

 

 

Dr. Heejun Yang

 

Department of Physics, KAIST

 

 

 

Apr. 2 (Fri.), 04:00 PM

 

Online seminar

 

https://kaist.zoom.us/j/85719491744
회의 ID: 857 1949 1744
암호: 757633

 

 

 

 

 

 

 

Abstract:

 

Each atomic layer in van der Waals (vdW) heterostructures possesses a distinct electronic band structure that can be manipulated for unique device operations. In the precise device architecture, the subtle but critical band coupling between the atomic layers,

varied by the momentum of electrons and external electric fields in device operation, has not yet been presented or applied to

designing original devices with the full potential of van der Waals heterostructures. I will introduce interlayer coupling spectroscopy at the device-scale based on the negligible quantum capacitance of two-dimensional semiconductors in lattice-orientation-tuned, resonant tunneling transistors. The effective band structures of the mono-, bi-, and quadrilayer of MoS2 and WSe2, modulated by the orientation- and external electric field-dependent interlayer coupling in device operations, could be demonstrated by the new conceptual spectroscopy overcoming the limitations of the former optical, photoemission, and tunneling spectroscopy. Based on the manipulation of the layer-by-layer potential, we achieved orbital-selective gating for tunneling phototransistor.

 

 

 

Contact: SunYoung Choi, (sun.0@kaist.ac.kr)

Center for Quantum Coherence in Condensed Matter, KAIST

번호 일시 장소 연사 제목
120 May 311 (Thu.), 04:00 PM  #1323, E6-2  Prof. Teun-Teun Kim  Dynamic control of optical properties with gated-graphene metamaterials file
119 May. 8th (Wed), 16:00  E6 Room(#1323)  Jieun Lee  Imaging valley dependent electron transport in 2D semiconductors file
118 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
117 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
116 May 9 (Wed.), 04:00 PM  #1323, E6-2  Prof. Jong-Soo Rhyee  Recent advances in thermoelectric bulk composites file
115 May. 11 (Fri.), 02:30 PM  E6-2. 1st fl. #1323  Dr. Kun Woo Kim  Disordered Floquet topological insulators file
114 May. 11 (Fri.), 04:00 PM  E6-2. 1st fl. #1323  Dr. Nam Kim  암페어 단위 재정의와 단전자 펌프 소자 개발 file
113 May. 11(Wed), 4pm  E6-2. #1323 & Zoom  Dr. Sunok Josephine Suh (Kavli Institute for Theoretical Physics)  Gravity as a phenomenon in quantum dynamics
112 May. 12 (Fri.), 01:30 PM  E6-2. 1st fl. #1323  Dr. Young Kuk Kim  Topological Dirac insulator
111 May. 12(Thu), 4pm  E6-2. #1323 & Zoom  Dr.Philip Chang (University of California San Diego, Department of Physics)  New frontiers of electroweak physics at the LHC
110 May. 13 (Fri.), 02:30 PM  Zoom webinar  Dr. Kun-Rok Jeon(Department of Physics, Chung-Ang University)  Topological Superconducting Spintronics Towards Zero-Power Computing Technologies file
109 May. 13 (Fri.), 04:00 PM  자연과학동(E6-2) 1st fl. #1323  Dr. Yosep Kim(Center for Quantum Information, KIST)  High-fidelity iToffoli gate for fixed-frequency superconducting qubits file
108 May. 14 (Fri.), 02:30 PM  Online seminar  Dr. Suyong Jung(KRISS)  Electrically tunable spin valve effect in vertical van-der-Waals magnetic tunnel junctions file
107 May. 14 (Fri.), 04:00 PM  Online seminar  Dr. Je-Hyung Kim(UNIST)  Spatial and temporal separation of environmental dephasing sources from solid-state quantum emitters file
106 May. 17 (Thu.), 01:30 PM  E6-2. 1st fl. #1323  Prof. Yong-Baek Kim University of Toronto  Quantum Spin Liquid in Kitaev Materials file
105 May. 17(Mon) 17:00  Zoom webinar  Jing Shi (UC Riverside, USA)  Spin current generation and detection in uniaxial antiferromagnets file
104 May. 18(Wed), 4pm  E6-2. #1323 & Zoom  Dr.Heeyeon Kim (Rutgers University, Department of Physics and Astronomy)  Geometry, Algebra, and Quantum Field Theory
103 May. 19(Thu), 4pm  E6-2. #1323 & Zoom  Dr.Jay Hyun Jo (Yale University, Department of Physics)  Chasing Long Standing Neutrino Anomalies with MicroBooNE
102 May. 25(Wed), 4pm  E6-2. 1st fl. #1323 / Zoom  Dr. Sungwoo Hong (Enrico Fermi Institute at University of Chicago)  Uncovering New Lampposts for Dark Matter: Continuum or Conformal
101 May. 25th (Wed), 14:00  E6 Room(#2501)  Dr. Duk-Hyun Choe(Samsung Advanced Institute of Technology)  Atomic-level insights into ferroelectric switching and preferred orientation of ultrathin hafnia file