Effect of out-of-plane disorder on superconducting gap anisotropy in Bi2+xSr2−xCaCu2O8+δ as seen via Raman spectroscopy
N. Murai, T. Masui, M. Ishikado, S. Ishida, H. Eisaki, S. Uchida, S. Tajima
DOI 10.1103/PhysRevB.85.020507 · Physical Review B
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Abstract
We report a systematic study of the variation of electronic Raman spectra as a function of disorder for Bi2+xSr2−xCaCu2O8+δ with different Bi:Sr nonstoichiometry. We have observed that, with increasing disorder, the suppression of the superconducting gap is observed only in the nodal region, while there is no change in the antinodal gap. This dichotomy of the response to disorder in the nodal and the antinodal gap can be interpreted as evidence for different origins of these two gaps.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Bi2+xSr2-xCaCu2O8+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 91.5 | Pressure not reported | unknown |
| Bi2+xSr2-xCaCu2O8+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 82 | Pressure not reported | unknown |
| Bi2+xSr2-xCaCu2O8+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 77 | Pressure not reported | unknown |
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