Electronic states and molecular dynamics of single-component molecular conductors [M(tmdt)2] (M=Ni, Pt) studied by 13C and 1H NMR

Abstract

The molecular conductors [M(tmdt)2] (M=Ni, Pt) consisting of single molecular species are investigated with 13C NMR and 1H NMR. The temperature dependences of 13C NMR shift and relaxation rate provide microscopic evidences for the metallic nature with appreciable electron correlations. Both compounds exhibit an anomalous frequency-dependent enhancement in 1H nuclear spin-lattice relaxation rate in a wide temperature range. These observations signify the presence of extraordinary molecular motions with low energy excitations.

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