Muon spin relaxation studies of superconductivity in a crystalline array of weakly coupled metal nanoparticles

被引：19

作者：

Bono, D.

Schnepf, A.

Hartig, J.

Schnoeckel, H.

Nieuwenhuys, G. J.

Amato, A.

de Jongh, L. J.

机构：

[1] Leiden Univ, Kamerlingh Onnes Lab, NL-2300 RA Leiden, Netherlands

[2] Univ Karlsruhe, Inst Anorgan Chem, D-76128 Karlsruhe, Germany

[3] Paul Scherrer Inst, Lab Muon Spin Spect, CH-5232 Villigen, Switzerland

来源：

PHYSICAL REVIEW LETTERS | 2006年 / 97卷 / 07期

关键词：

D O I：

10.1103/PhysRevLett.97.077601

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report muon-spin-relaxation studies in weak transverse fields of the superconductivity in the metal cluster compound, Ga-84[N(SiMe3)(2)](20)-Li6Br2(thf)(20)center dot 2 toluene. The temperature and field dependence of the muon-spin-relaxation rate and Knight shift clearly evidence type II bulk superconductivity below T-c approximate to 7.8 K, with B-c1 approximate to 0.06 T, B-c2 approximate to 0.26 T, kappa similar to 2, and weak flux pinning. The data are well described by the s-wave BCS model with weak electron-phonon coupling in the clean limit. A qualitative explanation for the conduction mechanism in this novel type of narrow-band superconductor is presented.

引用

页数：4

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