High-Tc superconductor YBa2Cu3O7−δ studied by positron annihilation
S. J. Wang, S. V. Naidu, S. C. Sharma, D. K. De, D. Y. Jeong, T. D. Black, S. Krichene, J. R. Reynolds, J. M. Owens
DOI 10.1103/PhysRevB.37.603 · Physical Review B
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Abstract
We have measured the positron-lifetime and the Doppler-broadening spectra in the high-temperature superconductor YBa2Cu3O7−δ as a function of temperature between 77 and 295 K. Positron-lifetime and Doppler-broadening data show new features in the superconducting phase. These results are interpreted in terms of positron localization in lattice distortions and positron surface states.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| YBa2Cu3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 87.5 | Pressure not reported | midpoint |
| YBa2Cu3F2Oy Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 155 | Pressure not reported | unknown |
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