Fulde-Ferrell-Larkin-Ovchinnikov superconductors near a surface

We show that the behavior of the Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) superconductors near a surface is considerably different from the usual case. The order parameter of the FF state is strongly deformed near the surface, which leads to a number of unusual features in the linear magnetic respons...

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Bibliographic Details
Published in:Physical review. B 2019-01, Vol.99 (1), p.1, Article 014503
Main Authors: Samokhin, K. V., Truong, B. P.
Format: Article
Language:English
Subjects:
Bulk density
Critical field (superconductivity)
Deformation
Diamagnetism
Fluids
Order parameters
Superfluidity
Temperature dependence
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Summary:We show that the behavior of the Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) superconductors near a surface is considerably different from the usual case. The order parameter of the FF state is strongly deformed near the surface, which leads to a number of unusual features in the linear magnetic response, such as “antiscreening” or “overscreening” of the applied field. In a fully isotropic FF case, the Meissner effect is still present, despite the vanishing of the transverse superfluid density in the bulk. We also calculate the surface critical field Hc3, which exhibits a peculiar temperature dependence.
ISSN:2469-9950
2469-9969
DOI:10.1103/PhysRevB.99.014503