ISSN:
1434-6079
Keywords:
74.30.Gn
;
74.70.Vy
;
76.60.Es
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract 13C and31P solid state NMR measurements on the organic ligands in ligated Au55, Ni8, Pt309, Cu36 and Cu70 clusters are reported. The ligands behave like diamagnetic organic molecules, giving rise to relatively narrow lines with excellent cross-polarization efficiency. The resonance lines of the nuclei directly bound to the metal core are systematically broadened in the conducting compounds. No pronounced Knight shifts or evidence of metallic-like relaxation were observed. These results support a model for the electrical conduction involving tunneling between metal cores with the ligands playing the role of a tunneling barrier.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01425606
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