Superconducting correlations in ultra-small metallic grains

G. S. Tian; L. H. Tang; Q. H. Chen

doi:10.1209/epl/i2000-00279-7

Superconducting correlations in ultra-small metallic grains

G. S. Tian^*, L. H. Tang, Q. H. Chen

^*Corresponding author for this work

Department of Physics

Research output: Contribution to journal › Journal article › peer-review

12 Citations (Scopus)

Abstract

To describe the crossover from the bulk BCS superconductivity to a fluctuation-dominated regime in ultrasmall metallic grains, new order parameters and correlation functions, such as "parity gap" and "pair-mixing correlation function", have been recently introduced. In this paper, we discuss the small-grain behaviour of the Penrose-Onsager-Yang off-diagonal long-range order (ODLRO) parameter in a pseudo-spin representation. Relations between the ODLRO parameter and those mentioned above are established through analytical and numerical calculations.

Original language	English
Pages (from-to)	361-367
Number of pages	7
Journal	Europhysics Letters
Volume	50
Issue number	3
DOIs	https://doi.org/10.1209/epl/i2000-00279-7
Publication status	Published - 1 May 2000

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AU - Tian, G. S.

AU - Tang, L. H.

AU - Chen, Q. H.

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N2 - To describe the crossover from the bulk BCS superconductivity to a fluctuation-dominated regime in ultrasmall metallic grains, new order parameters and correlation functions, such as "parity gap" and "pair-mixing correlation function", have been recently introduced. In this paper, we discuss the small-grain behaviour of the Penrose-Onsager-Yang off-diagonal long-range order (ODLRO) parameter in a pseudo-spin representation. Relations between the ODLRO parameter and those mentioned above are established through analytical and numerical calculations.

AB - To describe the crossover from the bulk BCS superconductivity to a fluctuation-dominated regime in ultrasmall metallic grains, new order parameters and correlation functions, such as "parity gap" and "pair-mixing correlation function", have been recently introduced. In this paper, we discuss the small-grain behaviour of the Penrose-Onsager-Yang off-diagonal long-range order (ODLRO) parameter in a pseudo-spin representation. Relations between the ODLRO parameter and those mentioned above are established through analytical and numerical calculations.

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DO - 10.1209/epl/i2000-00279-7

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EP - 367

JO - Europhysics Letters

JF - Europhysics Letters

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Superconducting correlations in ultra-small metallic grains

Abstract

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