Superconductivity and spin correlation in organic conductors: A quantum Monte Carlo study
Kazuhiko Kuroki, Hideo Aoki
DOI 10.1103/PhysRevB.60.3060 · Physical Review B
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Abstract
The d-wave pairing correlations along with spin correlation are calculated with the quantum Monte Carlo method for the two-dimensional Hubbard model on lattice structures representing organic superconductors κ−(BEDT−TTF)2X and (TMTSF)2X. In both cases the pairing correlations for superconducting order parameters with nodes are found to be enhanced. The symmetry and the enhancement of the pairing is systematically correlated with the spin structure factor, suggesting a spin-fluctuation mediated pairing. We have further found that, as we deform the Fermi surface to make the system approach the half-filled square lattice, the coherence of the pairing saturates while the local pairing amplitude continues to increase.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| (BEDT-TTF)2X Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| (TMTSF)2X 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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