KTaO3-based nanodevices

ORAL

Abstract

The KTaO3 (KTO)-based two dimensional electron gas (2DEG) has recently raised interest in the field of oxide interfaces, due to its superconductivity that depends on the KTO interface orientation [1,2]. Here we report the creation of KTO-based Josephson Junctions and SQUIDs, using conductive atomic force microscope (c-AFM) lithography [3]. These devices reflect the underlying spin-orbit coupling of KTO 2DEG, as well as its high kinetic inductance. The development of nanodevices positions KTO as a promising future platform for applications in quantum information and spintronics.

[1] Liu, Changjiang, et al. Science 371.6530 (2021): 716-721.

[2] Chen, Zheng, et al. Physical Review Letters 126.2 (2021): 026802.

[3] Yu, Muqing, et al. Nano Lett. 22.15 (2022): 6062–6068

* This work was supported by NSF PHY-1913034 (J. L. and D.P.) and NSF DMR-2225888 (J.L.). All work at Argonne was supported by the US Department of Energy, Office of Science, Basic Energy Sciences, Materials Sciences and Engineering Division. The use of facilities at the Center for Nanoscale Materials and the Advanced Photon Source, both Office of Science user facilities, was supported by the US Department of Energy, Basic Energy Sciences under Contract No. DE-AC02-06CH11357.

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Publication: Planned paper, still in preparation:
Sketched Nanoscale KTaO3-Based Superconducting Quantum Interference Device

Presenters

  • Muqing Yu

    University of Pittsburgh

Authors

  • Muqing Yu

    University of Pittsburgh

  • Nicholas M Hougland

    University Of Pittsburgh

  • Qianheng Du

    Argonne National Laboratory

  • Junyi Yang

    Argonne National Laboratory, University of Tennessee

  • Sayanwita Biswas

    University of Pittsburgh

  • Sayanwita Biswas

    University of Pittsburgh

  • ANAND BHATTACHARYA

    Materials Science Division, Argonne National Laboratory, Argonne National Laboratory

  • Patrick Irvin

    University of Pittsburgh, Department of Physics and Astronomy, University of Pittsburgh, Pittsburgh, PA 15260, USA

  • David Pekker

    University of Pittsburgh

  • Jeremy Levy

    University of Pittsburgh, Department of Physics and Astronomy, University of Pittsburgh, Pittsburgh, PA 15260, USA