Interplay of Disorder and Spin Fluctuations in the Resistivity near a Quantum Critical Point

A. Rosch
Phys. Rev. Lett. 82, 4280 – Published 24 May 1999
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Abstract

The resistivity in metals near an antiferromagnetic quantum critical point (QCP) is strongly affected by small amounts of disorder. In a quasiclassical treatment, we show that an interplay of strongly anisotropic scattering due to spin fluctuations and isotropic impurity scattering leads to a large regime where the resistivity varies as Tα, with an anomalous exponent, 1α1.5, depending on the amount of disorder. I argue that this mechanism explains in some detail the anomalous temperature dependence of the resistivity observed in CePd2Si2, CeNi2Ge2, and CeIn3 near the QCP.

  • Received 20 October 1998

DOI:https://doi.org/10.1103/PhysRevLett.82.4280

©1999 American Physical Society

Authors & Affiliations

A. Rosch

  • Serin Laboratory, Rutgers University, Piscataway, New Jersey 08854-0849

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Vol. 82, Iss. 21 — 24 May 1999

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