Reentrant orbital effect against superconductivity in the quasi-two-dimensional superconductor NbS\(_2\)

We derive integral equation for superconducting gap, which takes into account the quantum nature of electron motion in a parallel magnetic field in a quasi-two-dimensional (Q2D) superconductor in the presence of a non-zero perpendicular field component. By comparison of our theoretical results with...

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Bibliographic Details
Published in:arXiv.org 2021-03
Main Author: Lebed, Andrei G
Format: Article
Language:English
Subjects:
Conductors
Integral equations
Magnetic fields
Superconductivity
Online Access:Get full text
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Summary:We derive integral equation for superconducting gap, which takes into account the quantum nature of electron motion in a parallel magnetic field in a quasi-two-dimensional (Q2D) superconductor in the presence of a non-zero perpendicular field component. By comparison of our theoretical results with the recent experimental data obtained on the NbS\(_2\), we show that the orbital effect against superconductivity partially destroys superconductivity in the so-called Ginzburg-Landau area of this Q2D conductor, as expected. Nevertheless, at relatively high magnetic fields, \(H \simeq 15 \ T\), the orbital effect starts to improve the Fulde-Ferrell-Larkin-Ovchinnikov phase in the NbS\(_2\), due to the quantum nature of electron motion in a parallel magnetic field. In our opinion, this is the most clear demonstration that the orbital effect against superconductivity in a parallel magnetic field has a reversible nature.
ISSN:2331-8422
DOI:10.48550/arxiv.2103.15197