Superconductivity Mediated by Charge Fluctuations in Layered Molecular Crystals
Jaime Merino, Ross H. McKenzie
DOI 10.1103/PhysRevLett.87.237002 · Physical Review Letters
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Abstract
We consider the competition between superconducting, charge ordered, and metallic phases in layered molecular crystals with the θ and β′′ structures. Applying slave-boson theory to the relevant extended Hubbard model, we show that the superconductivity is mediated by charge fluctuations and the Cooper pairs have dxy symmetry. This is in contrast to the κ−(BEDT−TTF)2X family, for which theoretical calculations give superconductivity mediated by spin fluctuations and with dx2−y2 symmetry. We predict several materials that should become superconducting under pressure.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| (BEDT-TTF)2I3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 3.6 | Pressure unresolved | unknown |
| (BEDT-TTF)2SF5CH2CF2SO3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 5.2 | Pressure unresolved | unknown |
| (BEDT-TTF)2ReO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 2 | 0.4 GPa | unknown |
| (BEDT-TTF)4Pd(CN)4H2O Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 1.2 | 0.7 GPa | unknown |
| (BEDT-TTF)4Pt(CN)4H2O Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 2 | 0.65 GPa | unknown |
| (BEDT-TTF)4H3OFe(C2O4)3C6H5CN Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 8.5 | Pressure unresolved | unknown |
| (BEDT-TTF)4H3OCr(C2O4)3C6H5CN Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 5.5 | Pressure unresolved | unknown |
| (BETS)2Cl2TCNQ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 1.3 | 0.35 GPa | unknown |
| (BEDO-TTF)2ReO4H2O Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 2.5 | Pressure unresolved | unknown |
| (DIETS)2Au(CN)4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 8 | 1 GPa | unknown |
| (BEDT-TTF)3Cl22H2O Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 2.5 | 1.6 GPa | unknown |
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