On Intraband and Interband BCS Pairings in presence of hybridization in two-band superconductors

VP RAMUNNI, GM JAPIASSÚ Y A TROPER

PHYSICA C - SUPERCONDUTIVITY

Elsevier B.V.

Año: 2004 vol. 18 p. 355 - 357

0921-4534

We discuss the stability of the intraband (r=dd) and interband (r=sd) couplings in the presence of a constant hybridization on a two-band system. We calculate the critical temperature Tc,r associated to both type of couplings and then we obtain the values of εr=2|Ur|Δr(0)/kBTc,r and the isotope coefficients γr. One shows that under some circumstances, one can obtain values for εr and γr which differ considerably from standard BCS couplings for both Cooper pairings.