Publikation:

Spin-split Andreev bound states and diode effect in an Ising superconductor Josephson junction

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2025

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Tang, Gaomin

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http://nbn-resolving.de/urn:nbn:de:bsz:352-2-1a2ncxkoysrxe1
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https://doi.org/10.1103/physrevb.111.l060502
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CC BY 4.0

Angaben zur Forschungsförderung

Deutsche Forschungsgemeinschaft (DFG): 443404566
Deutsche Forschungsgemeinschaft (DFG): SPP 2244
National Natural Science Foundation of China: 12088101
National Natural Science Foundation of China: 12374048

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Physical Review B. American Physical Society (APS). 2025, 111(6), L060502. ISSN 2469-9950. eISSN 2469-9969. Verfügbar unter: doi: 10.1103/physrevb.111.l060502

Zusammenfassung

The transition-metal dichalcogenides featuring Ising spin-orbit coupling in so-called Ising superconductors offer a unique system to study the interplay of singlet and triplet superconductivity. The presence of high critical fields, spectral properties such as the mirage gap, and field-tunable charge and spin currents in Ising superconductor Josephson junctions are some of the important features. In this Letter, we study an Ising superconductor Josephson junction with a transparent interface and show that Andreev bound states are spin split due to a relative misorientation of in-plane fields in the superconducting contacts. Correspondingly, supercurrent-phase relations display a strongly nonsinusoidal behavior. Introducing additional spin-polarized channels with low transmission results in a nonreciprocal current-phase relation with a diode effect that can be tuned by the in-plane exchange fields. The diode efficiency reaches high values of the order of 40% and is not sensitive to disorder in the junction. Such structures can be realized in van der Waals heterostructures of two-dimensional superconductors and magnets.

Zusammenfassung in einer weiteren Sprache

Fachgebiet (DDC)
530 Physik

Schlagwörter

Ising superconductors, superconductivity, Josephson Junctions

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ISO 690PATIL, Sourabh Prakash, Gaomin TANG, Wolfgang BELZIG, 2025. Spin-split Andreev bound states and diode effect in an Ising superconductor Josephson junction. In: Physical Review B. American Physical Society (APS). 2025, 111(6), L060502. ISSN 2469-9950. eISSN 2469-9969. Verfügbar unter: doi: 10.1103/physrevb.111.l060502
BibTex
@article{Patil2025-02-12Spins-72358,
  title={Spin-split Andreev bound states and diode effect in an Ising superconductor Josephson junction},
  year={2025},
  doi={10.1103/physrevb.111.l060502},
  number={6},
  volume={111},
  issn={2469-9950},
  journal={Physical Review B},
  author={Patil, Sourabh Prakash and Tang, Gaomin and Belzig, Wolfgang},
  note={Article Number: L060502}
}
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