Local Lattice Instability and Superconductivity in La$ {1.85}$Sr$ {0.15}$Cu$ {1-x}$M$ x$O$ 4$ M=Mn, Ni, and Co - Condensed Matter > SuperconductivityReportar como inadecuado




Local Lattice Instability and Superconductivity in La$ {1.85}$Sr$ {0.15}$Cu$ {1-x}$M$ x$O$ 4$ M=Mn, Ni, and Co - Condensed Matter > Superconductivity - Descarga este documento en PDF. Documentación en PDF para descargar gratis. Disponible también para leer online.

Abstract: Local lattice structures of La$ {1.85}$Sr$ {0.15}$Cu$ {1-x}$M$ x$O$ 4$ M=Mn,Ni, and Co single crystals are investigated by polarized extended x-rayabsorption fine structure EXAFS. The local lattice instability at lowtemperature is described by in-plane Cu-O bond splitting. We find thatsubstitution of Mn for Cu causes little perturbation of local latticeinstability while Ni and Co substitution strongly suppresses the instability.The suppression of superconductivity by Cu-site substitution is related to theperturbation of lattice instability, indicating that local lattice instabilitypolaron plays an important role in superconductivity.



Autor: C. J. Zhang, H. Oyanagi

Fuente: https://arxiv.org/



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