Superconducting fluctuations in small grains - the Universal Hamiltonian and the reduced BCS model
Mesoscale and Nanoscale Physics
2008-06-12 v1 Superconductivity
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
Cite
@article{arxiv.0708.1339,
title = {Superconducting fluctuations in small grains - the Universal Hamiltonian and the reduced BCS model},
author = {Moshe Schechter},
journal= {arXiv preprint arXiv:0708.1339},
year = {2008}
}
Comments
Contribution to the proceedings of "Fluctuations and phase transitions in superconductors", Nazareth Ilit, Israel, June 10-14, 2007