Competing effects of mass anisotropy and spin-Zeeman coupling on the upper critical field of a mixed d- and s-wave superconductor
Wonkee Kim, Jian-Xin Zhu, C. S. Ting
DOI 10.1103/PhysRevB.61.4200 · Physical Review B
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Abstract
Based on the linearized Eilenberger equations, the upper critical field (Hc2) of mixed d- and s-wave superconductors has been microscopically studied with an emphasis on the competing effects of mass anisotropy and spin-Zeeman coupling. We find the mass anisotropy always enhances Hc2 while the Zeeman interaction suppresses Hc2. As required by the thermodynamics, we find Hc2 is saturated at zero temperature. We compare the theoretical calculations with recent experimental data of YBa2Cu3O7−δ.
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. | 84.3 | Pressure not reported | unknown |
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