Symmetry of superconductivity in NH3K3C60 superconductors: nonadiabatic effects in multiband systems
Yoshihiro Asai
DOI 10.1103/PhysRevB.68.014513 · Physical Review B
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Abstract
We have studied effects of nonadiabatic electron-intramolecular-vibration couplings on superconductivity in a multiband system of fullerides. The self-energy of the anomalous Green function was studied. Corrections to the Migdal approximation were taken into account for both the intraband and the interband couplings. While the nonadiabatic corrections to the intraband couplings favor anisotropic superconductivity, the corrections to the interband couplings favor isotropic superconductivity. This raises the theoretical possibility of the change of superconducting pairing symmetry close to the boundary between the superconducting and the antiferromagnetic phases of NH3K3C60 family of fullerides where lifting of the degeneracy of the t1u bands is expected.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| NH3K3C60 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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