Infrared Probe of Transition from Superconductor to Nonmetal in YBa2(Cu1−xZnx)4O8
D. N. Basov, B. Dabrowski, T. Timusk
DOI 10.1103/PhysRevLett.81.2132 · Physical Review Letters
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Abstract
We report on a study of the optical conductivity of single crystals of the high- Tc superconductor YBa2Cu4O8 in which superconductivity is suppressed by random substitution of Cu with Zn. The a-axis infrared spectrum, which is a direct measure of the charge dynamics in the CuO2 planes, is dominated by a bound state at ≈120cm−1. This indicates that the low-energy electronic states are on the verge of localization driven by the Zn impurities.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| YBa2Cu4O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 82 | Pressure unresolved | onset |
| YBa2(Cu0.993Zn0.007)4O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 60 | Pressure unresolved | unknown |
| YBa2(Cu0.986Zn0.014)4O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 45 | Pressure unresolved | unknown |
| YBa2(Cu0.965Zn0.035)4O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 4 | Pressure unresolved | unknown |
| YBa2Cu3O6.95 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| Bi2Sr2CaCu2O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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