engleski

Magnetic oscillations and field-induced spin-density waves in (TMTSF)(2)ClO4

We report an analysis of the effects of magnetic field on a quasi-one-dimensional band of interacting electrons with a transverse dimerizing potential. One-particle problem in bond-antibond representation is solved exactly. The resulting propagator is used to calculate the spin-density-wave (SDW) response of the interacting system within the matrix random-phase approximation for the SDW susceptibility. We find that the value of the anion potential fitting experiments in relaxed (TMTSF)(2)ClO4 is large, of the order of interchain hopping. In particular we predict the magnetic-field-induced transition of the first order between interband SDW0 and intraband SDW+/- phases, we reproduce the rapid oscillations with a period of 260 T and the overall profile of the (TMTSF)(2)ClO4 phase diagram.

ORGANIC CONDUCTOR (TMTSF)(2)CLO4 ; ONE-DIMENSIONAL CONDUCTORS ; QUANTUM OSCILLATIONS ; METALLIC PHASE ; SDW PHASES ; STATE ; TETRAMETHYLTETRASELENAFULVALENE ; MAGNETORESISTANCE ; TEMPERATURE ; TRANSITIONS

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