Bulletin of the American Physical Society
APS March Meeting 2022
Volume 67, Number 3
Monday–Friday, March 14–18, 2022; Chicago
Session G71: Interfacial Oxide Two-Dimensional Electron Systems
11:30 AM–2:18 PM,
Tuesday, March 15, 2022
Room: Hyatt Regency Hotel -Jackson Park C
Sponsoring
Unit:
DMP
Chair: Brendan Faeth, Cornell University
Abstract: G71.00007 : Effect of Temperature on Conductivity Decay of LaAlO3/SrTiO3 Nanostructures*
1:06 PM–1:18 PM
Presenter:
Aaron S Greenberg
(University of Pittsburgh)
Authors:
Aaron S Greenberg
(University of Pittsburgh)
Dengyu Yang
(Pittsburgh Quantum Institute)
Philip H Shenk
(University of Pittsburgh)
Joseph A Albro
(University of Pittsburgh)
Muqing Yu
(University of Pittsburgh)
Ki-Tae Eom
(University of Wisconsin-Madison)
Chang Beom Eom
(University of Wisconsin-Madison)
Patrick R Irvin
(University of Pittsburgh)
Jeremy Levy
(University of Pittsburgh)
The technique of conductive atomic force microscopy (c-AFM) lithography is capable of creating conductive LaAlO3/SrTiO3 (LAO/STO) nanostructures by controlling the charge state of the LAO surface [1]. It is also known that a “water cycle” mediates conductivity at the oxide interface [2] and causes self-erasure of nanostructures. Here we describe experiments in which we repeatedly expose written devices to temperatures above T=300 K and investigate the conductance decay for both 1D and 2D structures. The properties of LAO/STO nanostructures at elevated temperatures is helpful for understanding the water cycle in more detail, and has practical implications for device applications.
[1] C. Cen et al., Science 323, 1026-1030 (2009).
[2] F. Bi et al., Appl. Phys. Lett. 97, 173110 (2010).
*JL acknowledges support from NSF PHY-1913034. The work at University of Wisconsin-Madison was supported by the Air Force Office of Scientific Research FA9550-15-1-0334 and the Gordon and Betty Moore Foundation's EPiQS Initiative, Grant GBMF9065 to Chang-Beom Eom.
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