Title

Electron Correlations On a Mesoscopic Scale: Magnetic Properties of Transition Metal Telluride Cluster Compounds

Document Type

Article

Publication Date

1-1-1993

Abstract

We report the magnetic properties of a new class of materials: Ni9Te6n+ and Co6Te8n+ with n=0, 1, 2. These cluster compounds, which can be charged by chemical means from neutral to 2+, provide a unique and novel way to change the Fermi level. For most charge states we observe quenching of the spin and orbital moments at low temperatures, accompanied by a large value for the temperature independent susceptibility of the ground state. The generic presence of low-energy magnetic excitations in these compounds indicates that these systems exhibit strong electron correlations and form mesoscopic analogs of the mixed-valence heavy-fermion compounds.

DOI

10.1103/PhysRevLett.71.1768

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