Observation of dc voltage on segments of an inhomogeneous superconducting loop

Details Observation of dc voltage on segments of an inhomogeneous superconducting loop Observation of dc voltage on segments of an inhomogeneous superconducting loop

2001-05-18

arxiv.org/abs/physics/0105059v1

Physics

General Physics

4 pages, 4 figures

Scientific paper

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 $\Delta V$ measured on segments of symmetrical loop increases with the measuring current $I_{m}$ and $\Delta V = 0$ at $I_{m}= 0$ in accordance with the classical Little-Parks experiment. Whereas the $\Delta V$ 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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