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Temperature and Angular Dependence of the Magnetoresistance in Low Dimensional Organic Metals

J. S. Qualls·J. S. Brooks·S. Uji·T. Terashima·C. Terakura·H. Aoki·L. K. Montgomery
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Abstract

Detailed studies of the magnetoresistance of alpha-(ET)2KHg(SCN)4 and alpha-(ET)2TlHg(SCN)4 as a function of temperature, magnetic field strength, and field orientation are reported. Below 15 K, the temperature dependence of the magnetoresistance is metallic (dR/dT > 0) for magnetic field orientation corresponding to an angular dependent magnetoresistance oscillation (AMRO) minimum and nonmetallic (dR/dT < 0) at all other field orientations. We find that this behavior can be explained in terms of semiclassical models without the use of a non-Fermi liquid description. The alternating temperature dependence (metallic/nonmetallic)with respect to field orientation is common to any system with either quasi-one or two-dimensional AMRO. Furthermore, we report a new metallic property of the high field and low temperature regime of alpha-(ET)2MHg(SCN)4 (where M = K, Rb, or Tl) compounds.

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J. S. Qualls, J. S. Brooks, S. Uji, T. Terashima, C. Terakura, H. Aoki, L. K. Montgomery. 2000-05-12. Temperature and Angular Dependence of the Magnetoresistance in Low Dimensional Organic Metals. https://arxiv.org/abs/cond-mat/0005202

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