Demonstration of nonlocal Josephson effect in Andreev molecules

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Datum
2023
Autor:innen
Haxell, Daniel Z.
Coraiola, Marco
Hinderling, Manuel
ten Kate, Sofieke C.
Sabonis, Deividas
Svetogorov, A. E.
Cheah, Erik
Krizek, Filip
Schott, Rüdiger
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Zusammenfassung

We perform switching current measurements of planar Josephson junctions (JJs) coupled by a common superconducting electrode, with independent control over the two superconducting phase differences. We observe an anomalous phase shift in the current--phase relation of a JJ as a function of gate voltage or phase difference in the second JJ. This demonstrates a nonlocal Josephson effect, and the implementation of a φ0-junction which is tunable both electrostatically and magnetically. The anomalous phase shift was larger for shorter distances between the JJs and vanished for distances much longer than the superconducting coherence length. Results are consistent with the hybridization of ABSs, leading to the formation of an Andreev molecule. Our devices constitute a realization of a tunable superconducting phase source, and could enable new coupling schemes for hybrid quantum devices.

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530 Physik
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Superconductivity, Mesoscale and Nanoscale Physics, Andreev molecules
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ISO 690HAXELL, Daniel Z., Marco CORAIOLA, Manuel HINDERLING, Sofieke C. TEN KATE, Deividas SABONIS, A. E. SVETOGOROV, Wolfgang BELZIG, Erik CHEAH, Filip KRIZEK, Rüdiger SCHOTT, Werner WEGSCHEIDER, Fabrizio NICHELE, 2023. Demonstration of nonlocal Josephson effect in Andreev molecules
BibTex
@unpublished{Haxell2023-06-01Demon-67185,
  year={2023},
  title={Demonstration of nonlocal Josephson effect in Andreev molecules},
  author={Haxell, Daniel Z. and Coraiola, Marco and Hinderling, Manuel and ten Kate, Sofieke C. and Sabonis, Deividas and Svetogorov, A. E. and Belzig, Wolfgang and Cheah, Erik and Krizek, Filip and Schott, Rüdiger and Wegscheider, Werner and Nichele, Fabrizio}
}
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