Analogy between three-dimensional helimagnetic metals and two-dimensional nonmagnetic metals: Transport in the weakly disordered regime

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Analogy between three-dimensional helimagnetic metals and two-dimensional nonmagnetic metals: Transport in the weakly disordered regime

T. R. Kirkpatrick, D. Belitz, and Ronojoy Saha

Phys. Rev. B 77, 180405(R) – Published 20 May 2008

Abstract

We present a quasiparticle model that allows for a simple description of the electronic properties of metallic helimagnets. For weak quenched disorder, we find a leading linear temperature dependence of the electrical conductivity for three-dimensional materials. This is reminiscent of the behavior of nonmagnetic two-dimensional (2D) systems and reflects a general tendency of certain properties of bulk helimagnets to appear effectively 2D. The sign of the effect is opposite to that in nonmagnetic 2D materials. These surprising predictions should be observable in weak helimagnets.

Received 28 April 2008

DOI:https://doi.org/10.1103/PhysRevB.77.180405

Authors & Affiliations

T. R. Kirkpatrick¹, D. Belitz^2,3, and Ronojoy Saha²

¹Institute for Physical Science and Technology and Department of Physics, University of Maryland, College Park, Maryland 20742, USA
²Department of Physics and Institute of Theoretical Science, University of Oregon, Eugene, Oregon 97403, USA
³Kavli Institute for Theoretical Physics, University of California, Santa Barbara, California 93106, USA

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Issue

Vol. 77, Iss. 18 — 1 May 2008

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Physical Review B

covering condensed matter and materials physics