Quantum fluctuations and dissipation in superconducting granular films

W. Zwerger

doi:10.1016/0038-1098(87)90813-1

Quantum fluctuations and dissipation in superconducting granular films

W. Zwerger

Natural Sciences

Research output: Contribution to journal › Article › peer-review

13 Scopus citations

Abstract

We derive a quantum Ginzburg-Landau theory for the onset of superconductivity in two dimensional arrays of Josephson junctions which are shunted by ohmic resistors. The corresponding mean field phase diagram shows that the system is superconducting at zero temperature and arbitrary small Josephson coupling if the normal state resistance is smaller than qR_Q 4 with R_Q = h 4e² and q the average number of nearest neighbors. We study the suppression of quantum effects due to dissipation in the critical behavior and in the fluctuation induced diamagnetism.

Original language	English
Pages (from-to)	285-288
Number of pages	4
Journal	Solid State Communications
Volume	62
Issue number	4
DOIs	https://doi.org/10.1016/0038-1098(87)90813-1
State	Published - Apr 1987

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abstract = "We derive a quantum Ginzburg-Landau theory for the onset of superconductivity in two dimensional arrays of Josephson junctions which are shunted by ohmic resistors. The corresponding mean field phase diagram shows that the system is superconducting at zero temperature and arbitrary small Josephson coupling if the normal state resistance is smaller than qRQ 4 with RQ = h 4e2 and q the average number of nearest neighbors. We study the suppression of quantum effects due to dissipation in the critical behavior and in the fluctuation induced diamagnetism.",

author = "W. Zwerger",

note = "Funding Information: Acknowledgements -- This work has been supported by the Deutsche Forschungsgemeinschaft through SFB 128",

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N2 - We derive a quantum Ginzburg-Landau theory for the onset of superconductivity in two dimensional arrays of Josephson junctions which are shunted by ohmic resistors. The corresponding mean field phase diagram shows that the system is superconducting at zero temperature and arbitrary small Josephson coupling if the normal state resistance is smaller than qRQ 4 with RQ = h 4e2 and q the average number of nearest neighbors. We study the suppression of quantum effects due to dissipation in the critical behavior and in the fluctuation induced diamagnetism.

AB - We derive a quantum Ginzburg-Landau theory for the onset of superconductivity in two dimensional arrays of Josephson junctions which are shunted by ohmic resistors. The corresponding mean field phase diagram shows that the system is superconducting at zero temperature and arbitrary small Josephson coupling if the normal state resistance is smaller than qRQ 4 with RQ = h 4e2 and q the average number of nearest neighbors. We study the suppression of quantum effects due to dissipation in the critical behavior and in the fluctuation induced diamagnetism.

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DO - 10.1016/0038-1098(87)90813-1

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Quantum fluctuations and dissipation in superconducting granular films

Abstract

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