articlePhysical Review LettersJul 13, 2023HYBRID OA

Ubiquitous Superconducting Diode Effect in Superconductor Thin Films

YHYasen HouFNFabrizio NicheleHCHang ChiALAlessandro LodesaniYWYingying Wu

Massachusetts Institute of Technology · IBM Research - Zurich · +6 more institutions

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Abstract

The macroscopic coherence in superconductors supports dissipationless supercurrents that could play a central role in emerging quantum technologies. Accomplishing unequal supercurrents in the forward and backward directions would enable unprecedented functionalities. This nonreciprocity of critical supercurrents is called the superconducting (SC) diode effect. We demonstrate the strong SC diode effect in conventional SC thin films, such as niobium and vanadium, employing external magnetic fields as small as 1 Oe. Interfacing the SC layer with a ferromagnetic semiconductor EuS, we further accomplish the nonvolatile SC diode effect reaching a giant efficiency of 65%. By careful control experiments and…

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210
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37.33
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100%
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16

Topics & keywords

Topics
Keywords
  • Superconductivity
  • Supercurrent
  • Condensed matter physics
  • Meissner effect
  • Diode
  • Thin film
  • Materials science
  • Physics
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