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Updated: Jan 22, 2026

In Vitro Evaluation of The Effects Of Er,Cr:YSGG and Diode Lasers Used on Titanium Cylinder
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KTaO3-Based Supercurrent Diode.

Muqing Yu1, Jieun Kim2, Ahmed Omran1

  • 1Department of Physics and Astronomy, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States.

Nano Letters
|January 21, 2026
PubMed
Summary
This summary is machine-generated.

Researchers demonstrate the supercurrent diode effect (SDE) in LaAlO3/KTaO3 interfaces by engineering nanoscale superconducting weak links. This breakthrough enables tunable SDE polarity and efficient rectification, paving the way for dissipationless electronics.

Keywords:
KTaO3c-AFM lithographyoxide interfacesupercurrent diode effectvortex dynamics

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Area of Science:

  • Condensed Matter Physics
  • Materials Science
  • Quantum Electronics

Background:

  • The supercurrent diode effect (SDE) is crucial for dissipationless electronics and quantum circuits.
  • Achieving SDE necessitates breaking time-reversal and inversion symmetry in superconducting devices.

Purpose of the Study:

  • To engineer and demonstrate SDE in reconfigurable superconducting weak links at the LaAlO3/KTO interface.
  • To investigate the tunability of SDE polarity and rectification efficiency.
  • To understand the underlying physical mechanisms of SDE in this system.

Main Methods:

  • Utilized conductive atomic force microscope (c-AFM) lithography to pattern nanoscale weak links.
  • Fabricated devices at the LaAlO3/KTO interface.
  • Employed modest out-of-plane magnetic fields to induce and control SDE.
  • Performed time-dependent Ginzburg-Landau simulations.

Main Results:

  • Successfully realized SDE in engineered LaAlO3/KTO weak links.
  • Demonstrated reversible SDE polarity by altering weak link geometry.
  • Achieved rectification efficiencies up to 13% under optimal magnetic fields.
  • Simulations attributed SDE to asymmetric vortex motion in the engineered geometry.

Conclusions:

  • The LaAlO3/KTO interface provides a versatile platform for SDE.
  • Engineered nanoscale weak links offer precise control over SDE.
  • This work lays the foundation for novel quantum circuit elements based on vortex dynamics.