Universal inhomogeneous magnetic-field response in the normal state of cuprate high-T-c superconductors
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| Authors: | Mahyari, ZL; Cannell, A; de Mello, EVL; Ishikado, M; Eisaki, H; Liang, RX; Bonn, DA; Sonier, JE |
| Year: | 2013 |
| Journal: | Physical Review B 88 Article Link (DOI) |
| Title: | Universal inhomogeneous magnetic-field response in the normal state of cuprate high-T-c superconductors |
| Abstract: | We report the results of a muon spin rotation (mu SR) study of the bulk of Bi2+xSr2-xCaCu2O8+delta, as well as pure and Ca-doped YBa2Cu3Oy, which together with prior measurements reveal a universal inhomogeneous magnetic-field response of hole-doped cuprates extending to temperatures far above the critical temperature T-c. The primary features of our data are incompatible with the spatially inhomogeneous response being dominated by known charge-density-wave and spin-density-wave orders. Instead, the normal-state inhomogeneous line broadening is found to scale with the maximum value T-c(max) for each cuprate family, indicating it is controlled by the same energy scale as T-c. Since the degree of chemical disorder varies widely among the cuprates we have measured, the observed scaling constitutes evidence for an intrinsic electronic tendency toward inhomogeneity above T-c. |
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