Comment on ‘‘Observation of trapped O2 in high-Tc metal oxide superconductors’’
R. A. Rosenberg, C.-R. Wen
DOI 10.1103/PhysRevB.41.4781 · Physical Review B
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Abstract
In a recent paper Chen, Phillips, and McCann [Phys. Rev. B 39, 2744 (1989)] reported on the existence of trapped O2 in high-Tc superconductors on the basis of laser-based desorption methods. We point out that their method of surface preparation by laser ablation could generate trapped O2 and that the surface temperature reached during their laser-desorption experiment is sufficient to thermally desorb O2 from the bulk.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| YBa2Cu3O7-x Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| EuBa2Cu3O7-x 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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