Fractional-flux Little-Parks resistance oscillations in disordered superconducting Au\(_{0.7}\)In\(_{0.3}\) cylinders

Resistance of disordered superconducting Au\(_{0.7}\)In\(_{0.3}\) cylindrical films was measured as a function of applied magnetic field. In the high-temperature part of the superconducting transition regime, the resistance oscillated with a period of \(h/2e\) in the unit of the enclosed magnetic fl...

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Published in:arXiv.org 2001-10
Main Authors: Yu Zadorozhny, Liu, Y
Format: Article
Language:English
Subjects:
Cylinders
Free energy
High temperature
Magnetic flux
Magnetism
Superconductivity
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description Resistance of disordered superconducting Au\(_{0.7}\)In\(_{0.3}\) cylindrical films was measured as a function of applied magnetic field. In the high-temperature part of the superconducting transition regime, the resistance oscillated with a period of \(h/2e\) in the unit of the enclosed magnetic flux. However, at lower temperatures, the resistance peaks split. We argue that this splitting is due to the emergence of an oscillation with a period of \(h/4e\), half of the flux quantum for paired electrons. The possible physical origin of the \(h/4e\) resistance oscillation is discussed in the context of new minima in the free energy of a disordered superconducting cylinder.
doi_str_mv 10.48550/arxiv.9912003
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subjects Cylinders
Free energy
High temperature
Magnetic flux
Magnetism
Superconductivity
title Fractional-flux Little-Parks resistance oscillations in disordered superconducting Au\(_{0.7}\)In\(_{0.3}\) cylinders
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