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)
365 2023-06-08 16:00    Thermal decoupling in high-Tc cuprate superconductors
364 2019-05-31 11:00    Cavity QED with Spin Qubits file
363 2022-05-27 11:00    Current Status and Future Plans of ADMX file
362 2015-07-23 13:30    Enhanced ZnO based UV photonics and related applications file
361 2020-10-15 16:00    Graphene-based Josephson junction microwave bolometer file
360 2022-06-03 11:00    (응집물리 세미나) Theoretical Investigation of Exotic Quantum States in Low-dimensional Materials
359 2025-06-26 16:00  Prof. Eun-Ah Kim (Cornell)  Attention to Quantum Complexity file
358 2023-03-27 15:00    A coherent mechanical oscillator pumped by a suspended quantum dot file
357 2022-09-21 16:00    Materials and Device Nanofabrication of Optical Metasurfaces file
356 2023-11-01 16:00    [High Energy Theory Seminar] Modular functions and 3D N=4 rank-zero superconformal field theories
355 2019-02-21 16:00    B-meson charged current anomalies - Theoretical status file
354 2023-03-30 16:00    Detecting axions with chiral magnetic effects file
353 2019-09-18 16:00    Fall 2019: Physics Seminar Serises file
352 2016-03-07 16:00    Physics Colloquium : 2016 Spring file
351 2023-11-15 16:00    Quantum hydrodynamic theory for plasmonics: from molecule-coupling to nonlinear optics
350 2022-10-04 16:00    Distinguishing 6d (1, 0) SCFTs
349 2015-03-04 12:00    Bioimaging and Biosensing Using Near-Infrared Fluorescence file
348 2019-05-03 11:00    Exotic Magnetism file
347 2014-12-22 14:00    Dynamics of molecular motors: Power stroke vs Brownian ratchet file
346 2019-05-30 16:00    Tuning the excitonic properties of semiconductors with light-matter interactions file