Observation of dc voltage on segments of an inhomogeneous superconducting loop

S. V. Dubonos; V. I. Kuznetsov; A. V. Nikulov

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Observation of dc voltage on segments of an inhomogeneous superconducting loop

S. V. Dubonos·V. I. Kuznetsov·A. V. Nikulov

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Abstract

In order to verify a possibility of a dc voltage predicted on segments of an inhomogeneous superconducting loop the Little-Parks oscillations are investigated on symmetrical and asymmetric Al loops. The amplitude of the voltage oscillations $ΔV$ measured on segments of symmetrical loop increases with the measuring current $I_{m}$ and $ΔV = 0$ at $I_{m}= 0$ in accordance with the classical Little-Parks experiment. Whereas the $ΔV$ measured on segments of asymmetric loop has a maximum value at $I_{m}= 0$. The observation of the dc voltage at $I_{m}= 0$ means that one of the loop segments is a dc power source and others is a load. The dc power can be induced by both thermal fluctuation and a external electric noise.

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S. V. Dubonos, V. I. Kuznetsov, A. V. Nikulov. 2001-05-18. Observation of dc voltage on segments of an inhomogeneous superconducting loop. https://arxiv.org/abs/physics/0105059

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