Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
1997-10-23
Phys. Rev. B 57, 11854 (1998).
Physics
Condensed Matter
Strongly Correlated Electrons
5 pages, RevTeX + epsf, 2 figures. Slightly revised version to appear in Physical Review B, May 15, 1998
Scientific paper
10.1103/PhysRevB.57.11854
The 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 tesla 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 semi-classical transport theory and involving incoherent interlayer transport. The issues considered are similar to those raised by the magnetotransport of the cuprate superconductors.
Brooks James S.
Han Yunghsiang S.
McKenzie Ross H.
Qualls J. S.
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