International Workshop on Electronic Crystals
ECRYS - 93

J. Phys. IV France 03 (1993) C2-293-C2-298
DOI: 10.1051/jp4:1993259

Magnetic field influence on the spin-density wave of the organic conductor (TMTSF)₂NO₃

S. TOMIC¹, N. BISKUP¹, B. KORIN-HAMZIC¹, M. BASLETIC², A. HAMZIC², K. MAKI³, J.-M. FABRE⁴ and K. BECHGAARD<sup>5

1</sup>  Institute of Physics of the University, P.O. Box 304, 41000 Zagreb, Croatia
²  Department of Physics, Faculty of Science, P.O. Box 162, 41000 Zagreb, Croatia
³  Department of Physics, University of Southern California, Los Angeles, CA 90089-0484, U.S.A.
⁴  Université de Montpellier II, USTL, 34095 Montpellier France
⁵  University of Copenhagen, CISMI, DK 2100, Denmark

Abstract
We present the influence of a transverse magnetic field on the spindensity wave (SDW) ground state of the organic conductor (TMTSF)₂NO₃. Magnetic field increases the single-particle activation energy. A finite magnetic field (H_C induces discontinuities in the magnetoresistance behaviour and its value is temperature dependent. The threshold electric field (E_T) for the SDW sliding increases in a magnetic field. All observed effects are strongly angle-dependent indicating that they are determined by the magnetic field component along the least-conduction (c*) direction. We discuss these results in the framework of a theoretical model for the SDW with large imperfect nesting.

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