Spin-liquid model of the sharp drop in resistivity in superconducting La1.85 Ba0.125 CuO4

We use the phenomenological model proposed in our previous paper [Phys. Rev. Lett. 98, 237001 (2007)] to analyze the magnetic-field dependence of the onset temperature for two-dimensional fluctuating superconductivity T** (H). We demonstrate that the slope of T** (H) progressively goes down as H increases, such that the upper critical field progressively increases as T decreases. Quantitative agreement with the recent measurements of T** (H) in La1.85 Ba0.125 CuO4 is achieved for the same parameter value as was derived in our previous publication from the analysis of the electron self-energy.