Bulletin of the American Physical Society
APS March Meeting 2023
Volume 68, Number 3
Las Vegas, Nevada (March 5-10)
Virtual (March 20-22); Time Zone: Pacific Time
Session Q42: 2D Materials: Advanced Characterization IV
3:00 PM–5:24 PM,
Wednesday, March 8, 2023
Room: Room 318
Sponsoring
Unit:
DMP
Chair: Christopher Smallwood, San Jose State University
Abstract: Q42.00006 : Mechanically reconfigurable quantum devices in a van der Waals heterostructures*
4:24 PM–4:36 PM
Presenter:
Ian Sequeira
(University of California, Irvine)
Authors:
Ian Sequeira
(University of California, Irvine)
Andrew Barabas
(University of California, Irvine)
yuhui yang
(University of California, Irvine)
Aaron Barajas
(University of California, Irvine)
Kenji Watanabe
(National Institute for Materials Science)
Takashi Taniguchi
(National Institute for Materials Science)
Javier D Sanchez-Yamagishi
(University of California, Irvine)
Recently, we have shown that microscaled gold features deposited onto vdW materials also exhibit low sliding friction and applied this discovery to create lithographically defined mechanically reconfigurable structures. By arbitrarily patterning gold structures, we have developed techniques to manipulate and strongly grip vdW flakes while simultaneously providing electrical connection.
In this talk I will discuss our measurements on a reconfigurable graphene quantum point contact (QPC) device operated in the quantum hall regime. In this device, physically repositioning gold top gates defining the QPC mechanically modifies the electron confinement and tunes the edge mode tunnel coupling offering a wide range of control alongside traditional electrical tuning.
In addition, I will discuss our progress expanding our techniques to modify electron confinement in quantum dots as well as other manipulation experiments including in-situ straining, scanning probes, and twisting.
*NSF Career award 2046849
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