visual
visual

세미나

  • HOME
  • >
  • 소식
  • >
  • 세미나
날짜 2021-04-02 16:00 
일시 Apr. 2 (Fri.), 04:00 PM 
장소 Online(Zoom) 
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 날짜 장소 제목
229 2024-01-26 15:00  E6-2 #1323  In-situ 4D-STEM studies on surface reconstruction and polarization switching of perovskite oxides
228 2023-10-19 11:00  E6-2 #1322  Emergent functionalities of iridium oxide films with different growth orientation file
227 2018-12-26 16:00  E6-1. 3rd fl. #3434  Informal Workshop on Topology and Correlation file
226 2018-10-24 10:30  E6-1, Lecture Room 1501(1F)  Photonic integration of next-generation clocks and Hertz-absolute-accuarcy optical frequenncy synthesizers file
225 2024-04-19 15:00  E6-1, #1501  Engineering Physics for Semiconductor Equipment Innovation file
224 2023-02-27 12:00  E6-1 #1501  2023 봄학기 콜로키움 전체 일정 file
223 2022-09-21 10:30  E6-1 #1501  [Update 세미나 영상] Distinguished Lecture 'The Magic of Moiré Quantum Matter' Prof. Pablo Jarillo-Herrero(Department of Physics, MIT) file
222 2023-08-24 12:00  E6-1 #1501  2023 가을학기 콜로키움 전체 일정 file
221 2024-02-26 16:00  E6-1 #1501  2024 봄학기 콜로키움 전체 일정 file
220 2022-04-08 11:00  E6-1 #1323  (응집물리 세미나) Flat-surface-assisted physical phenomena occurring in single crystal metal thin film file
219 2022-03-25 11:00  E6-1 #1323  (응집물리 세미나) Hund's metallicity in ruthenate systems file
218 2022-05-20 11:00  E6-1 #1323  (응집물리 세미나) Exploration of new polymorphs in van der Waals crystals
217 2022-09-22 11:00  E6-1 #1323  2022 가을학기 응집물리 및 광학 세미나 전체 일정 file
216 2022-08-12 10:00  E6-1 #1323  Twisted Bilayer Magnets file
215 2022-08-12 10:00  E6-1 #1323  Twisted Bilayer Magnets file
214 2022-08-18 10:00  E6-1 #1323  Disorder-driven phase transition in the second-order non-Hermitian skin effect
213 2014-12-22 14:00  E6, Rm1319  Dynamics of molecular motors: Power stroke vs Brownian ratchet file
212 2023-09-27 16:00  E6, Rm#2501  Chiral Magnets: Domain-Wall Skyrmions and String Theory Realization
211 2023-06-26 11:00  E6, Rm#1323  Quantum computing on magnetic racetracks with flying domain wall qubits
210 2023-08-24 11:00  E6, Rm#1323  Advancing magnonic metamaterials: spin waves in nanomagnetic arrays