Anomalous dissipation in the mixed state of underdoped cuprates close to the superconductor-insulator boundary

Abstract

We present a comparative study of Nernst effect and resistivity in underdoped samples of Bi${}_2$Sr${}_2$CuO${}_{6+\delta }$ and La${}_{2-x}$Sr${}_x$CuO${}_4$. The Nernst effect presents a peak in a region of the H-T diagram where resistivity shows a non-metallic temperature dependence. Our results illustrate that the mechanism of dissipation in the mixed state of underdoped cuprates is poorly understood. Large quantum superconducting fluctuations and vanishing vortex viscosity are among suggested explanations for an enhanced Nernst signal close to the superconductor-insulator boundary.

arXiv comment5 pages including 3 figures

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• Nernst effect, quasiparticles, and d-density waves in cuprates
• Nernst effect as a probe of superconducting fluctuations in disordered thin films
• Superconducting fluctuations and the Nernst effect: A diagrammatic approach
• Nernst effect in the phase-fluctuating superconductor InO${}_x$
• Non linear excess conductivity of Bi${}_2$Sr${}_2$Ca${}_{n-1}$Cu${}_n$O${}_{2n+4+x}$ (n = 1,2), thin films
• Quantum Resistive Behaviors in the Vortex Liquid Regimes at Finite Temperatures
• Upper critical field from normal state fluctuations in Bi${}_2$Sr${}_2$CuO${}_{6+\delta }$
• Influence of Disorder on the Hall Effect in Bi${}_2$Sr${}_2$CuO${}_{6+\delta }$
• Comment on "Nernst effect in poor conductors and in the cuprate superconductors"
• Universal behavior in the Nernst effect of heavy fermion materials
• Probing microscopic models for system-bath interactions via parametric driving