Superconducting fluctuations in small grains - The Universal Hamiltonian and the reduced BCS model

Moshe Schechter

doi:10.1016/j.physc.2007.08.025

Superconducting fluctuations in small grains - The Universal Hamiltonian and the reduced BCS model

Moshe Schechter

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

1 Scopus citations

Abstract

Small superconducting grains are discussed in the frameworks of both the reduced BCS Hamiltonian and the Universal Hamiltonian. It is shown that fluctuations of electrons in levels far from the Fermi energy dominate superconducting properties in small and ultrasmall grains. Experimental consequences related to the spin susceptibility and persistent currents of grains and rings with weak electron-electron interactions are discussed.

Original language	English
Pages (from-to)	350-353
Number of pages	4
Journal	Physica C: Superconductivity and its Applications
Volume	468
Issue number	4
DOIs	https://doi.org/10.1016/j.physc.2007.08.025
State	Published - 15 Feb 2008
Externally published	Yes

Keywords

Fluctuations
Granular
Superconductivity

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Energy Engineering and Power Technology
Electrical and Electronic Engineering

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10.1016/j.physc.2007.08.025

Cite this

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title = "Superconducting fluctuations in small grains - The Universal Hamiltonian and the reduced BCS model",

abstract = "Small superconducting grains are discussed in the frameworks of both the reduced BCS Hamiltonian and the Universal Hamiltonian. It is shown that fluctuations of electrons in levels far from the Fermi energy dominate superconducting properties in small and ultrasmall grains. Experimental consequences related to the spin susceptibility and persistent currents of grains and rings with weak electron-electron interactions are discussed.",

keywords = "Fluctuations, Granular, Superconductivity",

author = "Moshe Schechter",

note = "Funding Information: This work was supported by NSERC of Canada and PITP.",

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AU - Schechter, Moshe

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Y1 - 2008/2/15

N2 - Small superconducting grains are discussed in the frameworks of both the reduced BCS Hamiltonian and the Universal Hamiltonian. It is shown that fluctuations of electrons in levels far from the Fermi energy dominate superconducting properties in small and ultrasmall grains. Experimental consequences related to the spin susceptibility and persistent currents of grains and rings with weak electron-electron interactions are discussed.

AB - Small superconducting grains are discussed in the frameworks of both the reduced BCS Hamiltonian and the Universal Hamiltonian. It is shown that fluctuations of electrons in levels far from the Fermi energy dominate superconducting properties in small and ultrasmall grains. Experimental consequences related to the spin susceptibility and persistent currents of grains and rings with weak electron-electron interactions are discussed.

KW - Fluctuations

KW - Granular

KW - Superconductivity

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DO - 10.1016/j.physc.2007.08.025

M3 - Article

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EP - 353

JO - Physica C: Superconductivity and its Applications

JF - Physica C: Superconductivity and its Applications

IS - 4

ER -

Superconducting fluctuations in small grains - The Universal Hamiltonian and the reduced BCS model

Abstract

Keywords

ASJC Scopus subject areas

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