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SrTiO3 and KTaO3-based Nanoelectronics

Yu, Muqing (2024) SrTiO3 and KTaO3-based Nanoelectronics. Doctoral Dissertation, University of Pittsburgh. (Unpublished)

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Abstract

Complex oxides offer a wide range of unique properties. The coupling between spin, charge, orbital and lattice degree of freedom renders a rich phase diagram including superconductivity, ferroelectricity, ferromagnetism and so on. Meanwhile, semiconducting and superconducting nanodevices are the key components of quantum transport, quantum sensing and quantum simulation. Oxide nanoelectronics sit at the intersection of these two major areas, where we can fabricate functional devices as well as probe exotic physics. In this thesis, I would like to summarize my work on mesoscale devices created at oxide heterointerfaces. In Chapter 1, two material platforms of interest are introduced, namely SrTiO3 (STO) and KTaO3 (KTO). In Chapter 2, techniques to create and measure nanodevices are reviewed. In Chapter 3, I aim to extend the lifetime of nanodevices in air, created at the interface between LaAlO3 (LAO) and STO. Chapter 4 demonstrates LAO/STO membranes as a free-standing nanoelectronic platform. Chapter 5 and Chapter 6 establish LAO/KTO as a new platform for reconfigurable superconducting devices, where superconducting weak links and quantum interference devices are realized. At last I will point out some future research directions in Chapter 7.

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Details

Item Type: University of Pittsburgh ETD
Status: Unpublished
Creators/Authors:
CreatorsEmailPitt UsernameORCID
Yu, Muqingmuy7@pitt.edumuy70000-0002-0528-7712
ETD Committee:
TitleMemberEmail AddressPitt UsernameORCID
Committee ChairLevy, Jeremyjlevy@pitt.edu
Committee MemberAryes, Freitasafreitas@pitt.edu
Committee MemberRoger, Mongrmong@pitt.edu
Committee MemberBenjamin, Huntbenjaminmhunt@gmail.com
Committee MemberThomas, PurdyTPP9@pitt.edu
Date: 27 August 2024
Date Type: Publication
Defense Date: 22 April 2024
Approval Date: 27 August 2024
Submission Date: 3 May 2024
Access Restriction: 2 year -- Restrict access to University of Pittsburgh for a period of 2 years.
Number of Pages: 173
Institution: University of Pittsburgh
Schools and Programs: Dietrich School of Arts and Sciences > Physics
Degree: PhD - Doctor of Philosophy
Thesis Type: Doctoral Dissertation
Refereed: Yes
Uncontrolled Keywords: SrTiO3, KTaO3, Nanoelectronics, Superconductivity, Josephson Junction, SQUID, Free-standing Membrane
Date Deposited: 27 Aug 2024 14:34
Last Modified: 27 Aug 2024 14:34
URI: http://d-scholarship.pitt.edu/id/eprint/46380

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