Stochastic resonance phenomenon in a superconducting surface state of single-crystal Nb

M. Tsindlekht; I. Felner; M. Gitterman; B. Ya Shapiro

doi:10.1103/PhysRevB.62.4073

Stochastic resonance phenomenon in a superconducting surface state of single-crystal Nb

M. Tsindlekht, I. Felner, M. Gitterman, B. Ya Shapiro

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Abstract

We report an experimental observation of a stochastic resonance pheomenon in single-crystal Nb. Measurements of the nonlinear susceptibility of Nb (Formula presented) have been performed as a function of temperature, and applied dc and ac fields. The latter consist of a high-frequency signal with an amplitude modulation at low-frequency. Nonmonotonic changes of the nonlinear response have been found as a function of the dc and ac fields in a surface superconducting state of Nb. The theoretical analysis based on the two level model of a stochastic resonance phenomenon provides a qualitative explanation of the experimental results.

Original language	English
Pages (from-to)	4073-4078
Number of pages	6
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	62
Issue number	6
DOIs	https://doi.org/10.1103/PhysRevB.62.4073
State	Published - 2000
Externally published	Yes

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10.1103/PhysRevB.62.4073

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abstract = "We report an experimental observation of a stochastic resonance pheomenon in single-crystal Nb. Measurements of the nonlinear susceptibility of Nb (Formula presented) have been performed as a function of temperature, and applied dc and ac fields. The latter consist of a high-frequency signal with an amplitude modulation at low-frequency. Nonmonotonic changes of the nonlinear response have been found as a function of the dc and ac fields in a surface superconducting state of Nb. The theoretical analysis based on the two level model of a stochastic resonance phenomenon provides a qualitative explanation of the experimental results.",

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AU - Felner, I.

AU - Gitterman, M.

AU - Shapiro, B. Ya

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AB - We report an experimental observation of a stochastic resonance pheomenon in single-crystal Nb. Measurements of the nonlinear susceptibility of Nb (Formula presented) have been performed as a function of temperature, and applied dc and ac fields. The latter consist of a high-frequency signal with an amplitude modulation at low-frequency. Nonmonotonic changes of the nonlinear response have been found as a function of the dc and ac fields in a surface superconducting state of Nb. The theoretical analysis based on the two level model of a stochastic resonance phenomenon provides a qualitative explanation of the experimental results.

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Stochastic resonance phenomenon in a superconducting surface state of single-crystal Nb

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