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Schottky barrier diodes are specialized semiconductor devices characterized by their unique construction. This construction involves combining a metal layer with a moderately doped n-type semiconductor material. This combination leads to the formation of a Schottky barrier, a pivotal element that defines the diode's operational characteristics. The core functionality of Schottky barrier diodes is their capacity to allow current to flow in only one direction due to their distinctive...
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Self-Field-Induced Josephson Diode Effect.

Arman Rashidi1, Sina Ahadi1, Susanne Stemmer1

  • 1Materials Department, University of California, Santa Barbara, California 93106-5050, United States.

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|June 23, 2025
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Summary
This summary is machine-generated.

This study reveals that the self-field of supercurrents can induce Josephson diode effects (JDEs) in superconducting junctions. These findings are crucial for developing advanced superconducting electronics and quantum technologies.

Keywords:
Josephson diodeJosephson junctionsuperconducting quantum interferencetopological insulator

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Area of Science:

  • Condensed Matter Physics
  • Quantum Electronics
  • Materials Science

Background:

  • Josephson diodes are key nonlinear superconducting circuit elements.
  • Applications include solid-state qubit readout and coupling.
  • Various mechanisms can generate Josephson diode effects (JDEs).

Purpose of the Study:

  • Investigate JDEs generated by the supercurrent's self-field.
  • Explore JDEs in planar hybrid Josephson junctions.
  • Understand the role of self-field effects in superconducting devices.

Main Methods:

  • Experimental investigation of JDEs in supercurrent quantum interference patterns.
  • Utilized planar hybrid Josephson junctions with cadmium arsenide and a superconductor.
  • Developed a model incorporating the supercurrent self-field.

Main Results:

  • A model including the supercurrent self-field accurately describes experimental observations.
  • Self-field-induced JDEs are generally expected in planar junctions under specific conditions.
  • JDEs were observed even in symmetric and uniform junctions with sufficient critical currents.

Conclusions:

  • Self-field-induced JDEs are a general phenomenon in planar Josephson junctions.
  • These effects are tunable via supercurrent density and other parameters.
  • Provides a new mechanism for realizing Josephson diodes in superconducting circuits.