Electronic states and molecular dynamics of single-component molecular conductors [M(tmdt)${}_2$] (M=Ni, Pt) studied by ${}^{13}$C and ${}^1$H NMR

Abstract

The molecular conductors [M(tmdt)${}_2$] (M=Ni, Pt) consisting of single molecular species are investigated with ${}^{13}$C NMR and ${}^1$H NMR. The temperature dependences of ${}^{13}$C 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 ${}^1$H nuclear spin-lattice relaxation rate in a wide temperature range. These observations signify the presence of extraordinary molecular motions with low energy excitations.

14 pages, 11 figures

References in corpus (5)

• Single-Component Molecular Metals as Multiband π-d Systems
• NMR Evidence for Antiferromagnetic Transition in the Single-Component Molecular Conductor, [Au(tmdt)_{2}] at 110 K
• Electronic States of Single-Component Molecular Conductors [M(tmdt)2]
• NMR Evidence for Antiferromagnetic Transition in the Single-Component Molecular System, [Cu(tmdt)${}_2$]
• Electron Correlations in the Quasi-Two-Dimensional Organic Conductor $\theta$-(BEDT-TTF)${}_2$I${}_3$ investigated by ${}^{13}$C NMR

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• Single-component molecular material hosting antiferromagnetic and spin-gapped Mott subsystems
• A spin-gapped Mott insulator with the dimeric arrangement of twisted molecules Zn(tmdt)${}_2$