Spin-liquid model of the sharp resistivity drop in $La_{1.85}Ba_{0.125}CuO_4$

Details Spin-liquid model of the sharp resistivity drop in $La_{1.85}Ba_{0.125}CuO_4$ Spin-liquid model of the sharp resistivity drop in $La_{1.85}Ba_{0.125}CuO_4$

2007-06-29

arxiv.org/abs/0706.4342v2

Physics

Condensed Matter

Superconductivity

4 pages, 2 figures

Scientific paper

10.1103/PhysRevB.76.100509

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 $T^{**} (H)$. 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. The quantitative agreement with the recent measurements of $T^{**} (H)$ 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.

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