Possible high-Tc superconductivity mediated by antiferromagnetic spin fluctuations in systems with Fermi surface pockets
Kazuhiko Kuroki, Ryotaro Arita
DOI 10.1103/PhysRevB.64.024501 · Physical Review B
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Abstract
We propose that if there are two small pocketlike Fermi surfaces, and the spin susceptibility is pronounced around a wave vector Q that bridges the two pockets, the spin-singlet superconductivity mediated by spin fluctuations may have a high transition temperature. Using the fluctuation exchange approximation, this idea is confirmed for the Hubbard on a lattice with alternating hopping integrals, for which Tc is estimated to be almost an order of magnitude larger than those for systems with a large connected Fermi surface.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Hubbard 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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