Violation of Kohler's rule by the magnetoresistance of a quasi-two-dimensional organic metal

TitleViolation of Kohler's rule by the magnetoresistance of a quasi-two-dimensional organic metal
Publication TypeJournal Article
Year of Publication1998
AuthorsMcKenzie, Ross H., Qualls J. S., Han S. Y., and Brooks J. S.
JournalPhysical Review B
Volume57
Issue19
Pagination11854–11857
AbstractThe interlayer magnetoresistance of the quasi-two-dimensional metal alpha-(BEDT-TTF)(2)KHg(SCN)(4) is considered. In the temperature range from 0.5 to 10 K and for fields up to 10 T the magnetoresistance has a stronger temperature dependence than the zero-field resistance. Consequently Kohler's rule is not obeyed for any range of temperatures or fields. This means that the magnetoresistance cannot be described in terms of semiclassical transport on a single Fermi surface with a single scattering time. Possible explanations for the violations of Kohler's rule are considered, both within the framework of semiclassical transport theory and involving incoherent interlayer transport. The issues considered are similar to those raised by the magnetotransport of the cuprate superconductors. [S0163-1829(98)13219-8].