Quantum Critical Behavior in Disordered Itinerant Ferromagnets: Instability of the Ferromagnetic Phase

Abstract

An effective field theory is derived that describes the quantum critical behavior of itinerant ferromagnets as the transition is approached from the ferromagnetic phase. This complements a recent study of the critical behavior on the paramagnetic side of the phase transition, and investigates the role of the ferromagnetic Goldstone modes near criticality. We find that the Goldstone modes have no direct impact on the critical behavior, and that the critical exponents are the same as determined by combining results from the paramagnetic phase with scaling arguments.

arXiv comment11 pp., revtex4, no figs

References in corpus (6)

• Quantum critical behavior of disordered itinerant ferromagnets
• Theory of many-fermion systems
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Cited by in corpus (2)

• Influence of Generic Scale Invariance on Classical and Quantum Phase Transitions
• Phase-ordering dynamics in itinerant quantum ferromagnets