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Interaction of magnetic field-dependent Peierls and spin-Peierls ground states in (Per)2[Pt(mnt)2]

Green, E. L. G. ; Brooks, J. S. ; Kuhns, P. L. K. ; Reyes, A. P. R. ; Lumata, L. L. L. ; Almeida, M. ; Matos, M. ; Henriques, R. T. ; Wright, J. A. W. ; Brown, S. E. B.

Physical Review B - Condensed Matter and Materials Physics Vol. 84, Nº 12, pp. 121101 - 121104, September, 2011.

ISSN (print): 1098-0121
ISSN (online):

Journal Impact Factor: 3,736 (in 2014)

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The interaction of parallel conducting perylene and insulating spin-1/2 [Pt(mnt)2] molecular chains in (Per)2[Pt(mnt)2] is investigated through the magnetic field dependence of their coupled Peierls (charge density wave - CDW) and spin-Peierls (SP) ground states. Proton NMR is used to monitor the spin-chain behavior, and signatures in the NMR spectrum and spin-relaxation rate are compared with previous electrical transport measurements that describe the metal-insulator transition in the perylene chains associated with the CDW phase boundary.We find that the SP and CDWchains remain coupled to high fields, at variance with a simplemean-field description, and that symmetry breaking in the perylene CDW transition may drive the nearly simultaneous SP transition.