Aa. Golubov et al., TEMPERATURE-DEPENDENCE OF THE MAGNETIC-FIELD PENETRATION DEPTH IN YBA2CU3O7-DELTA - EFFECT OF IMPURITY SCATTERING, Fizika nizkih temperatur, 22(5), 1996, pp. 494-498
Temperature dependence of the anisotropic magnetic field penetration d
epth of a two-band superconductor is calculated in the model of strong
s-wave pairing interaction in one of the bands (S band) and induced s
uperconductivity ill the second band (N band). The results of the calc
ulations are compared with experimental data on the (ab) plane and c a
xis penetration depth in YBa2Cu3O7-delta. It is shown that all recent
measurements over the entire temperature range ore consistent with the
two-band model.