Reply to ``Comment on `Paramagnetic Meissner effect in Nb' ''
P. Kostic-acute, B. Veal, A. P. Paulikas, U. Welp, V. R. Todt, C. Gu, U. Geiser, J. M. Williams, K. D. Carlson, R. A. Klemm
DOI 10.1103/PhysRevB.55.14649 · Physical Review B
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Abstract
Rice and Sigrist (RS) have proposed a d-wave mechanism to explain the paramagnetic Meissner effect (PME) observed in some inhomogeneous samples of high-Tc superconductors. However, the observation of a PME in some inhomogeneous samples of Nb (an s-wave superconductor) demonstrates that a d-wave pairing mechanism is not needed to produce the effect. Moreover, the remarkable similarity between the PME observed in these Nb and in the high-Tc samples argues that the same mechanism is operable in both types of superconductors. In this Reply, new measurements on La2CuO4+δ and on irradiated Nb are discussed, which strongly support the notion that the PME is most likely associated with layered Tc inhomogeneities. Further experiments to test this notion are proposed. We also discuss critically the three experiments proposed by RS to distinguish between two PME mechanisms unrelated to layered Tc inhomogeneities.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Nb 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 |
| YBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| La2CuO4+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| Bi1.8Pb0.4Sr2Ca2Cu3O10 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 109.5 | Pressure not reported | onset |
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