Nernst effect and Critical Field in Cuprate Superconductors

Abstract

A series of recent experiments on the Nernst effect, upper critical field $H_{c2}$ and enhanced diamagnetic magnetization $M$ by Wang et al (PRB 73, 024510), were interpreted as to provide evidence for the pseudogap scenario which long-range phase coherence is destroyed by thermally-created vortices. We present here calculations in good agreement with these measurements but based on the local formation of conventional Bogoliubov-deGennes (BdG) superconducting regions in doped disordered cuprate superconductors. Our results imply in an alternate scenario which the disorder plays a fundamental role in the high critical temperature superconductors (HTSC) physics.

8 pages and 4 eps figures

References in corpus (3)

• A `checkerboard' electronic crystal state in lightly hole-doped Ca_{2-x}Na_{x}CuO_{2}Cl_{2}
• Inhomogeneity Induces Resonance Coherence Peaks in Superconducting BSCCO
• Evidence of ion diffusion at room temperature in microcrystals of the Bi2Sr2CaCu2O8+delta superconductor

Cited by in corpus (8)

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• Coexistence of Dirac-Cone States and Superconductivity in Iron Pnictide Ba(Fe${}_{1-x}$Ru${}_x$As)${}_2$
• Enhancement of superconducting fluctuation under the coexistence of a competing pseudogap state in Bi2Sr2-xRxCuOy
• Electronic Phase Separation Transition as the Origin of the Superconductivity and the Pseudogap Phase of Cuprates
• High-field muSR studies of superconducting and magnetic correlations in cuprates above Tc
• Development of spatial inhomogeneity of internal magnetic field above $T_{\mathrm{c}}$ in Bi${}_2$Sr${}_2$Ca${}_{1-x}$Y${}_x$Cu${}_2$O${}_{8+\delta }$ observed by longitudinal-field muon-spin-relaxation
• Measurements and analysis of the upper critical field $H_{c2}$ on an underdoped and overdoped $L{a}_{2-x}S{r}_{x}Cu{O}_4$ compounds