Pre-asymptotic critical behavior and effective exponents in disordered metallic quantum ferromagnets

Abstract

We determine the pre-asymptotic critical behavior at the quantum ferromagnetic transition in strongly disordered metals. We find that it is given by effective power laws, in contrast to the previously analyzed asymptotic critical behavior, which is valid only in an unobservably small region. The consequences for analyzing experiments are discussed, in particular ways to distinguish between critical behavior and Griffiths-phase effects.

5 pp, 2 figs

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Cited by in corpus (2)

• Quantum critical scaling in the disordered itinerant ferromagnet UCo${}_{1-x}$Fe${}_x$Ge
• Hyperscaling analysis of a disorder-induced ferromagnetic quantum critical point in Ni${}_{1-x}$Rh${}_x$ with $x=0.375$