Real-space order parameter in layered cuprate superconductors
G. S. Lee
DOI 10.1103/PhysRevB.49.3616 · Physical Review B
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Abstract
We analyze the center-of-mass order parameter in s-wave and d-wave superconductors and find a large spatial dc term in the s wave but none in the d wave. Thus, the d-wave hypothesis may reconcile high-temperature superconductivity with Hohenberg’s theorem. The center-of-mass order parameter has nodes at Cu sites and peaks at O sites with opposite signs at x- and y-bonded oxygens. At boundaries, it attains opposite amplitudes for x and y edges. A singular Ginzburg-Landau parameter at Tc is predicted, which suggests that the maximum energy gap opens quickly.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Bi2Sr2CuO6+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 8 | Pressure not reported | unknown |
| Tl2Ba2CuO6+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 90 | Pressure not reported | unknown |
| HgBa2CuO4+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 94 | Pressure not reported | unknown |
| Bi2Sr2CaCu2O8+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 80 | Pressure not reported | unknown |
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