Quantum ferromagnetic transition in disordered itinerant electron systems

Abstract

An effective field theory is derived for the ferromagnetic transition of diffusive electrons at T=0. The static disorder which leads to diffusive electron dynamics induces an effective long-range interaction between the spins of the form 1/r^(2d-2). This leads to unusual scaling behavior at the quantum critical point, which is determined exactly. The crossover from this quantum fixed point to the classical Heisenberg fixed point should be observable in ferromagnetic materials with low Curie temperatures.

4pp, REVTeX, no figs, final version as published

References in corpus (2)

• Crossover and scaling in a nearly antiferromagnetic Fermi liquid in two dimensions
• Quantum Phase Transitions and Conserved Charges

Cited by in corpus (6)

• Metallic Quantum Ferromagnets
• Nonanalytic behavior of the spin susceptibility in clean Fermi systems
• Quantum critical behavior of clean itinerant ferromagnets
• Some basic aspects of quantum phase transitions
• Breakdown of Landau-Ginzburg-Wilson theory for certain quantum phase transitions
• Quantum critical behavior of itinerant ferromagnets