https://doi.org/10.1140/epjb/e2004-00308-5
On the Meissner effect in a superconductor with 4-fermion attraction
Faculty of Pharmacy, The Ludwik Rydygier Medical University
in Bydgoszcz, ul. Jagiellońska 13, 85-067 Bydgoszcz, Poland
Corresponding author: a tarasek1@amb.bydgoszcz.pl
Received:
10
March
2004
Revised:
14
June
2004
Published online:
12
October
2004
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 Λ in real space
which is taken by the system 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 λ of external
magnetic field. V4 is nonzero only within a thin layer of
1-fermion energies around the chemical potential μ.
PACS: 74.20.-z – Theories and models of superconducting state / 74.20.Fg – BCS theory and its development
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2004
