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

Abstract

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 $T^{\ast \ast }(H)$. We demonstrate that the slope of $T^{\ast \ast }(H)$ 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 $T^{\ast \ast }(H)$ in $L{a}_{1.85}B{a}_{0.125}Cu{O}_4$ is achieved for the same parameter value as was derived in our previous publication from the analysis of the electron self energy.

4 pages, 2 figures

References in corpus (2)

• Two-Dimensional Superconducting Fluctuations in Stripe-Ordered La(1.875)Ba(0.125)CuO(4)
• Phenomenological theory of the underdoped phase of a high-T${}_c$ superconductor

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