UPPER CRITICAL-FIELD IN A SPIN-CHARGE-SEPARATED SUPERCONDUCTOR

It is demonstrated that the spatial decay of the pair propagator in a Luttinger liquid with spin-charge separation contains a logarithmic co rrection relative to the free-Fermi-gas result in a finite interval be tween the spin and charge thermal lengths. It is argued that similar e ffects can be expected in higher-dimensional systems with spin-charge separation and that the temperature dependence of the upper critical f ield H-c2 curve is a probe of this effect.