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5 October 2023 Diode effect in Josephson junctions with a single magnetic atom: Experiment and theory
Felix von Oppen, Jacob Steiner, Larissa Melischek, Martina Trahms, Katharina Franke
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Proceedings Volume PC12656, Spintronics XVI; PC126560Q (2023) https://doi.org/10.1117/12.2675988
Event: SPIE Nanoscience + Engineering, 2023, San Diego, California, United States
Abstract
Currents in diodes are asymmetric with bias direction, a phenomenon known as nonreciprocal transport. Recently, diode behavior was realized in superconducting systems. I will discuss superconducting diode effects observed in Josephson junctions realized in an STM. Junctions of an elemental superconductor exhibit hysteretic behavior, typical of low-dissipation junctions, but no asymmetry. Nonreciprocal supercurrents emerge when inserting a single magnetic atom, with the preferred direction depending on atomic species. After describing the experiment, I will present a theory of Josephson diodes, relating asymmetries in switching and retrapping currents to different microscopic symmetry requirements and providing a microscopic understanding of experiment.
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Felix von Oppen, Jacob Steiner, Larissa Melischek, Martina Trahms, and Katharina Franke "Diode effect in Josephson junctions with a single magnetic atom: Experiment and theory", Proc. SPIE PC12656, Spintronics XVI, PC126560Q (5 October 2023); https://doi.org/10.1117/12.2675988
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KEYWORDS
Diodes
Chemical species
Magnetism
Superconductors
Switching
Electronic components
Lead
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