Critical Magnetic Field of Ultra-Thin Superconducting Films and Interfaces

Zwicknagl, Gertrud; Jahns, Simon; Fulde, Peter

doi:10.7566/JPSJ.86.083701

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Critical Magnetic Field of Ultra-Thin Superconducting Films and Interfaces

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Fulde, Peter
Max Planck Institute for the Physics of Complex Systems, Max Planck Society;

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https://journals.jps.jp/doi/10.7566/JPSJ.86.083701
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Citation

Zwicknagl, G., Jahns, S., & Fulde, P. (2017). Critical Magnetic Field of Ultra-Thin Superconducting Films and Interfaces. Journal of the Physical Society of Japan, 86(8): 083701. doi:10.7566/JPSJ.86.083701.

Cite as: https://hdl.handle.net/11858/00-001M-0000-002E-0FC3-4

Abstract

We derive an analytic expression for the temperature dependent critical magnetic field parallel to ultra-thin superconducting films with Rashba spin-orbit interaction. Thereby we cover the range from small to large spin-orbit interactions. compared with the gap parameter Delta(0). We find that at a critical spin-orbit energy lambda(c) a first-order phase transition takes place at which the pairing momentum of the Cooper pairs changes discontinuously. We speculate that this might give raise to new phenomena. With increasing lambda/Delta(0) the pair formation changes from inter-band to intra-band pairing. For lambda > lambda(c) a dimensional cross-over of the critical field from two to one dimension is taking place.