Spin-liquid model of the sharp resistivity drop in $L{a}_{1.85}B{a}_{0.125}Cu{O}_4$

We use the phenomenological model proposed in our previous paper [Phys. Rev. Lett. {\bf 98}, 237001 (2007)] to analyse the magnetic field dependence of the onset temperature for two-dimensional fluctuating superconductivity $T^{} (H)$\mathrm{.}Wedemonstratethattheslopeof$T^{} (H)$progressivelygoesdownas$H$increases,suchthattheuppercriticalfieldprogressivelyincreasesas$T$decreases\mathrm{.}Thequantitativeagreementwiththerecentmeasurementsof$T^{**} (H)$in$La_{1.85}Ba_{0.125}CuO_4$ is achieved for the same parameter value as was derived in our previous publication from the analysis of the electron self energy.