References

mrisel

Magnetic Resonance in Solids

2072-5981

Kazan Federal University

10.26907/mrsej-24113

mrisel-252

Research Article

Статьи

Note on possibility of proximity induced spontaneous currents in superconductor/normal metal heterostructures

Volkov

A. F.

Bochum D-44801

Eremin

I. M.

Bochum D-44801

ieremin74@googlemail.com

Ruhr-UniversitätGermany

2024

19042024

261

SPECIAL ISSUE dedicated to Boris I. Kochelaev's 90th birthday

24113 (8 pp.)

2024

Volkov A.F., Eremin I.M.

Данная работа распространяется под лицензией Creative Commons Attribution 4.0.

This work is licensed under a Creative Commons Attribution 4.0 License.

https://www.mrsej.ru/jour/article/view/252

We analyse the possibility of the appearance of spontaneous currents in proximated superconducting/normal metal (S/N) heterostructure when Cooper pairs penetrate into the normal metal from the superconductor. In particular, we calculate the free energy of the S/N structure. We show that whereas the free energy of the N film FN in the presence of the proximity effect increases compared to the normal state, the total free energy, which includes the boundary term FB, decreases. The condensate current decreases FN, but increases the total free energy making the current-carrying state of the S/N system energetically unfavorable.

proximity effectspontaneous supercurrentsuperconductivity

The authors wish Boris Ivanovich Kochelaev all the best on the occasion of his 90ies birthday and are happy to contribute with this note to the journal volume devoted to this event. We thank also Sebastian Bergeret for pointing out the importance of the boundary term in the free energy functional and Anton Vorontsov and Patric Holmvall for useful comments and discussions.

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The authors declare that there are no conflicts of interest present.