@article{Haxell2023-02-23Measu-66224,
  year={2023},
  doi={10.1103/physrevlett.130.087002},
  title={Measurements of Phase Dynamics in Planar Josephson Junctions and SQUIDs},
  number={8},
  volume={130},
  issn={0031-9007},
  journal={Physical Review Letters},
  author={Haxell, Daniel Z. and Cheah, Erik and Křížek, Filip and Schott, Rüdiger and Ritter, Markus F. and Hinderling, Manuel and Belzig, Wolfgang and Bruder, Christoph and Wegscheider, Werner and Riel, Heike and Nichele, Fabrizio},
  note={Article Number: 087002}
}

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    <dc:contributor>Cheah, Erik</dc:contributor>
    <dc:contributor>Nichele, Fabrizio</dc:contributor>
    <dc:rights>Attribution 4.0 International</dc:rights>
    <dc:creator>Haxell, Daniel Z.</dc:creator>
    <dc:contributor>Schott, Rüdiger</dc:contributor>
    <dc:contributor>Bruder, Christoph</dc:contributor>
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    <dcterms:abstract>We experimentally investigate the stochastic phase dynamics of planar Josephson junctions (JJs) and superconducting quantum interference devices (SQUIDs) defined in epitaxial InAs/Al heterostructures, and characterized by a large ratio of Josephson energy to charging energy. We observe a crossover from a regime of macroscopic quantum tunneling to one of phase diffusion as a function of temperature, where the transition temperature T∗ is gate-tunable. The switching probability distributions are shown to be consistent with a small shunt capacitance and moderate damping, resulting in a switching current which is a small fraction of the critical current. Phase locking between two JJs leads to a difference in switching current between that of a JJ measured in isolation and that of the same JJ measured in an asymmetric SQUID loop. In the case of the loop, T∗ is also tuned by a magnetic flux.</dcterms:abstract>
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    <dc:creator>Nichele, Fabrizio</dc:creator>
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