Multi-band superconductors have enhanced critical temperatures

Henheik, Sven Joscha; Langmann, Edwin; Lauritsen, Asbjørn Bækgaard

Multi-band superconductors have enhanced critical temperatures

Henheik SJ, Langmann E, Lauritsen AB. Multi-band superconductors have enhanced critical temperatures. arXiv, 10.48550/arXiv.2409.17297.

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https://doi.org/10.48550/arXiv.2409.17297 [Preprint]

DOI

10.48550/arXiv.2409.17297

Preprint | Draft | English

Author

Henheik, Sven Joscha^ISTA ; Langmann, Edwin; Lauritsen, Asbjørn Bækgaard^ISTA

Corresponding author has ISTA affiliation

Department

Erdoes Group
Seiringer Group

Abstract

We introduce a multi-band BCS free energy functional and prove that for a multi-band superconductor the effect of inter-band coupling can only increase the critical temperature, irrespective of its attractive or repulsive nature and its strength. Further, for weak coupling and weaker inter-band coupling, we prove that the dependence of the increase in critical temperature on the inter-band coupling is (1) linear, if there are two or more equally strongly superconducting bands, or (2) quadratic, if there is only one dominating band.

Publishing Year

2024

Date Published

2024-10-21

Journal Title

arXiv

IST-REx-ID

19550

Cite this

Henheik SJ, Langmann E, Lauritsen AB. Multi-band superconductors have enhanced critical temperatures. arXiv. doi:10.48550/arXiv.2409.17297

Henheik, S. J., Langmann, E., & Lauritsen, A. B. (n.d.). Multi-band superconductors have enhanced critical temperatures. arXiv. https://doi.org/10.48550/arXiv.2409.17297

Henheik, Sven Joscha, Edwin Langmann, and Asbjørn Bækgaard Lauritsen. “Multi-Band Superconductors Have Enhanced Critical Temperatures.” ArXiv, n.d. https://doi.org/10.48550/arXiv.2409.17297.

S. J. Henheik, E. Langmann, and A. B. Lauritsen, “Multi-band superconductors have enhanced critical temperatures,” arXiv. .

Henheik SJ, Langmann E, Lauritsen AB. Multi-band superconductors have enhanced critical temperatures. arXiv, 10.48550/arXiv.2409.17297.

Henheik, Sven Joscha, et al. “Multi-Band Superconductors Have Enhanced Critical Temperatures.” ArXiv, doi:10.48550/arXiv.2409.17297.

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