Theory of the Resistive Transition in Overdoped $Tl_2Ba_2CuO_{6+x}$: Implications for the angular dependence of the quasiparticle scattering rate in High-$T_c$ superconductors

V. B. Geshkenbein; L. B. Ioffe; A. J. Millis

doi:10.1103/PhysRevLett.80.5778

paper

Theory of the Resistive Transition in Overdoped $T l_{2} B a_{2} C u O_{6 + x}$ : Implications for the angular dependence of the quasiparticle scattering rate in High- $T_{c}$ superconductors

arXiv:cond-mat/9801059 · doi:10.1103/PhysRevLett.80.5778

Abstract

We show that recent measurements of the magnetic field dependence of the magnetization, specific heat and resistivity of overdoped $T_{c} \sim 17 K$ $T l_{2} B a_{2} C u O_{6 + δ}$ in the vicinity of the superconducting $H_{c 2}$ imply that the vortex viscosity is anomalously small and that the material studied is inhomogeneous with small, a few hundred $A ˚$ , regions in which the local $T_{c}$ is much higher than the bulk $T_{c}$ . The anomalously small vortex viscosity can be derived from a microscopic model in which the quasiparticle lifetime varies dramatically around the Fermi surface, being small everywhere except along the zone diagonal (``cold spot''). We propose experimental tests of our results.

4 pages, LaTex, 2 EPS figures

References in corpus (1)

Flux-flow in d-wave superconductors: Low temperature universality and scaling

Theory of the Resistive Transition in Overdoped Tl2​Ba2​CuO6+x​: Implications for the angular dependence of the quasiparticle scattering rate in High-Tc​ superconductors

Abstract

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Theory of the Resistive Transition in Overdoped $T l_{2} B a_{2} C u O_{6 + x}$ : Implications for the angular dependence of the quasiparticle scattering rate in High- $T_{c}$ superconductors