Electronic states studies of alkali-metal-doped C60 superconductors by nuclear magnetic resonance
- 1 November 1993
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 63 (18) , 2561-2563
- https://doi.org/10.1063/1.110433
Abstract
The density of states at the Fermi level [N(EF)] of alkali‐metal‐doped C60 superconductors having a wide range of Tc from Na2Rb1C60 (Tc=3.5 K) to Rb1Cs2C60 (Tc=33 K) is systematically studied using spin‐lattice relaxation times (T1) by NMR spectroscopy. The obtained N(EF) values suggest that the phonon modes associated with superconductivity are high and that the electron‐phonon coupling constant is responsible for the large decrease in Tc in the small lattice parameter region.Keywords
This publication has 17 references indexed in Scilit:
- Non-Korringa 13 C Nuclear Relaxation in the Normal State of the K 3 C 60 SuperconductorEurophysics Letters, 1993
- Dominance of the spin-dipolar NMR relaxation mechanism in fullerene superconductorsPhysical Review B, 1993
- Specific-heat jump at and normal-state magnetic susceptibility ofPhysical Review Letters, 1992
- Structural and electronic properties of sodium-intercalated C60Nature, 1992
- Electronic properties of normal and superconducting alkali fullerides probed bynuclear magnetic resonancePhysical Review Letters, 1992
- Microwave study of superconductivity in alkali-metal-doped fullerene C60 filmsJournal of the American Chemical Society, 1992
- Normal-State Magnetic Properties of K 3 C 60Europhysics Letters, 1992
- 13 C NMR Spectroscopy of K
x
C 60 : Phase Separation, Molecular Dynamics, and Metallic PropertiesScience, 1991
- Relation of structure and superconducting transition temperatures in A3C60Nature, 1991
- Critical magnetic fields in the superconducting state ofPhysical Review Letters, 1991