Electron correlations on a mesoscopic scale: Magnetic properties of transition metal telluride cluster compounds

T. T.M. Palstra, M. L. Steigerwald, A. P. Ramirez, Y. U. Kwon, S. M. Stuczynski, L. F. Schneemeyer, J. V. Waszczak, J. Zaanen

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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.

Original languageEnglish
Pages (from-to)1768-1771
Number of pages4
JournalPhysical Review Letters
Volume71
Issue number11
DOIs
StatePublished - 1 Jan 1993

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Palstra, T. T. M., Steigerwald, M. L., Ramirez, A. P., Kwon, Y. U., Stuczynski, S. M., Schneemeyer, L. F., Waszczak, J. V., & Zaanen, J. (1993). Electron correlations on a mesoscopic scale: Magnetic properties of transition metal telluride cluster compounds. Physical Review Letters, 71(11), 1768-1771. https://doi.org/10.1103/PhysRevLett.71.1768