On the Meissner effect in a superconductor with 4-fermion attraction |
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Authors: | Email author" target="_blank">P?TarasewiczEmail author |
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Institution: | (1) Faculty of Pharmacy, The Ludwik Rydygier Medical University in Bydgoszcz, ul. Jagiello ska 13, 85-067 Bydgoszcz, Poland |
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Abstract: | A presence of a Meissner-Ochsenfeld effect in a gas of spin 1/2 fermions with an interaction
, where
is a volume of a region
in real space which is taken by thesystem and
with
,
satisfying Fermi anticommutation relations, is investigated. The effect proves to be weaker than in BCS by a factor 3/4 at T = 0, implying a greater penetration depth
of external magnetic field. V
4 is nonzero only within a thin layer of 1-fermion energies around the chemical potential .Received: 14 June 2004, Published online: 12 October 2004PACS:
74.20.-z Theories and models of superconducting state - 74.20.Fg BCS theory and its development |
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Keywords: | |
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