Rg. Dias et Jm. Wheatley, UPPER CRITICAL-FIELD IN A SPIN-CHARGE-SEPARATED SUPERCONDUCTOR, Physical review. B, Condensed matter, 50(18), 1994, pp. 13887-13889
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.