Fractional-flux little-parks resistance oscillations in disordered superconducting Au0.7In0.3 cylinders

Yu Zadorozhny, Ying Liu

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

The resistance of disordered superconducting Au0.7In0.3 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 units 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.

Original languageEnglish (US)
Pages (from-to)712-718
Number of pages7
JournalEurophysics Letters
Volume55
Issue number5
DOIs
StatePublished - Sep 1 2001

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oscillations
magnetic flux
free energy
magnetic fields
electrons

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

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abstract = "The resistance of disordered superconducting Au0.7In0.3 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 units 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.",
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Fractional-flux little-parks resistance oscillations in disordered superconducting Au0.7In0.3 cylinders. / Zadorozhny, Yu; Liu, Ying.

In: Europhysics Letters, Vol. 55, No. 5, 01.09.2001, p. 712-718.

Research output: Contribution to journalArticle

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AB - The resistance of disordered superconducting Au0.7In0.3 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 units 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.

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