Stochastic resonance phenomenon in a superconducting surface state of single-crystal Nb
M. I. Tsindlekht, I. Felner, M. Gitterman, B. Ya. Shapiro
DOI 10.1103/PhysRevB.62.4073 · Physical Review B
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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 (Tc≈9.15 K) 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.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Nb Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 9.15 | Pressure not reported | unknown |
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