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Condensed Matter > Superconductivity

arXiv:2301.12979 (cond-mat)
[Submitted on 30 Jan 2023]

Title:Interference-induced surface superconductivity:Enhancement by tuning the Debye energy

Authors:Yunfei Bai, Yajiang Chen, M. D. Croitoru, A. A. Shanenko, Xiaobing Luo, Yunbo Zhang
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Abstract:In the usual perception, surface superconductivity is associated with the surface nucleation of a superconducting condensate above the upper critical field in type-II superconductors or with a rearrangement of phonon properties and the electron-phonon coupling near surfaces/interfaces. Recently, it has been found that there is another example when the surface superconducting temperature is increased up to 20-25% as compared to the bulk one due to constructive interference of superconducting pair states. In the present work, we demonstrate that in fact, such an interferenceinduced enhancement can be much more pronounced, up to nearly 70%. Furthermore, here it is shown that such an interference enhancement persists over a wide range of microscopic parameters.
Subjects: Superconductivity (cond-mat.supr-con)
Cite as: arXiv:2301.12979 [cond-mat.supr-con]
  (or arXiv:2301.12979v1 [cond-mat.supr-con] for this version)
  https://doi.org/10.48550/arXiv.2301.12979
Journal reference: Phys. Rev. B 107, 024510 (2023)
Related DOI: https://doi.org/10.1103/PhysRevB.107.024510

Submission history

From: Yajiang Chen [view email]
[v1] Mon, 30 Jan 2023 15:24:32 UTC (439 KB)
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