Non-analytic behavior of 2D itinerant ferromagnets

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 non-analyticities which destroy a continuous second-order transition. Depending on the parameters, the transition either becomes first-order, or occurs via an intermediate spiral phase.

4 pages, 3 figures

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• Quantum Order-by-Disorder in Strongly Correlated Metals
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• The quantum critical behavior of antiferromagnetic itinerant systems with van Hove singularities of electronic spectrum
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• False Vacuum Decay in Flat-Band Ferromagnets: Role of Quantum Geometry and Chiral Edge States
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