https://doi.org/10.1007/s100510050949
Anomalous temperature dependence of resistivity in quasi-one-dimensional conductors in a strong magnetic field
Department of Physics and Center for Superconductivity
Research, University of Maryland, College Park,
MD 20742-4111, USA
Received:
20
October
1998
Published online: 15 October 1999
We present a heuristic, semiphenomenological model of the anomalous
temperature (T) dependence of resistivity 
recently
observed experimentally in the quasi-one-dimensional (Q1D) organic
conductors of the 
family in moderately strong
magnetic fields. We suggest that a Q1D conductor behaves like an
insulator (
), when its effective dimensionality is
one, and like a metal (
), when its effective
dimensionality is greater than one. Applying a magnetic field
reduces the effective dimensionality of the system and switches the
temperature dependence of resistivity between the insulating and
metallic laws depending on the magnitude and orientation of the
magnetic field. We critically analyze whether various microscopic
models suggested in literature can produce such a behavior and find
that none of the models is fully satisfactory. In particular, we
perform detailed analytical and numerical calculations within the
scenario of magnetic-field-induced spin-density-wave precursor
effect suggested by Gor'kov and find that the theoretical results do
not agree with the experimental observations.
PACS: 72.10.-d – Theory of electronic transport; scattering mechanisms / 72.15.Gd – Galvanomagnetic and other magnetotransport effects / 75.30.Fv – Spin-density waves
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 1999
