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Nonanalytic behavior of two-dimensional itinerant ferromagnets

Dmitry V. Efremov1, Joseph J. Betouras2, and Andrey Chubukov3

  • 1Institute for Theoretical Physics, Technical University of Dresden, 01062 Dresden, Germany
  • 2Scottish Universities Physics Alliance, Department of Physics and Astronomy, University of St. Andrews, St. Andrews KY16 9SS, Scotland, United Kingdom
  • 3Department of Physics, University of Wisconsin-Madison, 1150 University Avenue, Madison, Wisconsin 53706, USA

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Phys. Rev. B 77, 220401(R) – Published 9 June, 2008

DOI: https://doi.org/10.1103/PhysRevB.77.220401

Abstract

We consider an ordered ferromagnet in the vicinity of a T=0 transition into a paramagnet. We show that the free energy and the transverse and longitudinal static susceptibilities contain nonanalyticities which destroy a continuous second-order transition. Depending on the parameters, the transition either becomes first order or occurs via an intermediate spiral phase.

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References (12)

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Outline

Information

Phys. Rev. B 77, 220401(R)– Published 9 June, 2008
  • Received 9 May 2008

© 2008 American Physical Society

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