Superconductivity in a Molecular Metal Cluster Compound

O. Bakharev (1) , D. Bono (1) , H.B. Brom (1) , A. Schnepf (2) , H. Schnoeckel (2) , L.J. de Jongh (1)

1 Kamerlingh Onnes Laboratory
2 Institut fur Anorganische Chemie

Compelling evidence for band-type conductivity and even bulk superconductivity below $T_{\text{c}}\approx 8$~K has been found in $^{69,71}$Ga-NMR experiments in crystalline ordered, giant Ga$_{84}$ cluster-compounds. This material appears to represent the first realization of a theoretical model proposed by Friedel in 1992 for superconductivity in ordered arrays of weakly coupled, identical metal nanoparticles.

Mots clés: superconductivity; cluster; nanoparticles; NMR; relaxation rate; Knight shift

Domaines: Electrons fortement corrélés [cond-mat.str-el]; Supraconductivité [cond-mat.supr-con]

O. Bakharev, D. Bono, H.B. Brom, A. Schnepf, H. Schnoeckel, et al.. Superconductivity in a Molecular Metal Cluster Compound. Physical Review Letters, 2006, 96, pp.117002. ⟨10.1103/PhysRevLett.96.117002⟩. ⟨hal-00014411v2⟩