Non-analytic behavior of 2D itinerant ferromagnets

Details Non-analytic behavior of 2D itinerant ferromagnets Non-analytic behavior of 2D itinerant ferromagnets

2008-04-17

arxiv.org/abs/0804.2736v1

Phys. Rev. B 77, 220401(R), (2008)

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 3 figures

Scientific paper

10.1103/PhysRevB.77.220401

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.

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