visual
visual

세미나

  • HOME
  • >
  • 소식
  • >
  • 세미나
날짜 2021-04-02 16:00 
연사  
장소 Online(Zoom) 

 

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 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)
292 2021-03-25 16:00    Search for dark matter axion with Rydberg atoms file
291 2021-04-02 14:30    Quantum computing and entanglement generation using trapped ions and photons
» 2021-04-02 16:00    Van der Waals heterostructures for orbital gating-based phototransistors and electronic spectroscopy
289 2021-04-09 10:00    Integrated Lithium Niobate Photonics file
288 2021-04-19 19:00    Evidence of Electrical Switching in Antiferromagnets and Coherent Spin Pumping file
287 2021-05-14 14:30    Electrically tunable spin valve effect in vertical van-der-Waals magnetic tunnel junctions file
286 2021-05-14 16:00    Spatial and temporal separation of environmental dephasing sources from solid-state quantum emitters file
285 2021-05-17 17:00    Spin current generation and detection in uniaxial antiferromagnets file
284 2021-05-27 16:00    찾아가는 물리연구 현장(유럽 입자물리학연구소 소개) file
283 2021-06-08 10:00    Photonic crystal devices for sensing file
282 2021-06-11 14:30    Engineering sound waves and vibrations in multi-mode nanomechanical systems file
281 2021-06-11 16:00    Pseudogap in surface-doped black phosphorus file
280 2021-06-22 17:00    Spintronics meets Quantum Materials file
279 2021-07-29 14:00    Gravitationally Induced Dark Sector and Inflationary Dynamics file
278 2021-11-02 16:00    Metrology of Band Topology via Resonant Inelastic X-ray Scattering file
277 2021-12-03 14:30    Topological Spin Textures: Skyrmions and Beyond file
276 2021-12-03 16:00    Nonequilibrium Heat Transport in Elemental Metals Probed by an Ultrathin Magnetic Thermometer file
275 2022-01-11 15:00    Ultrafast optical studies on CDW collective modes of the Weyl-CDW (TaSe4)2I file
274 2022-01-12 11:00    Spectroscopic study of trapped ions towards probing dark matter and new physics file
273 2022-01-17 14:00    Five Lectures on Observational Probes of Dark Energy file