Change of parity of the order parameter in high-temperature superconductors due to impurities
A. A. Abrikosov
DOI 10.1103/PhysRevB.53.R8910 · Physical Review B
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Abstract
The dependence of the critical temperature on impurity concentration is calculated for a model of a tetragonal high-Tc superconductor described in a previous paper [A. A. Abrikosov, Phys. Rev. B 52, R15 738 (1995)] under conditions when the odd (d symmetry) order parameter is favorable for a clean substance. The critical temperature decreases rapidly with increasing impurity concentration according to the general pair-braking formula and tends to zero at a critical concentration. Since, however, the critical temperature for the phase with an even order parameter is only weakly influenced by impurities, it eventually exceeds the Tc of the odd phase, and this means a phase transition to the even phase. The Tc curve is expected to have a kink and a long tail.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| YBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 93 | Pressure not reported | unknown |
| Bi2Sr2CaCu3O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| Nd2-xCexCuO4 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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