Phys. Rev. Lett. 89, 247202 (2002) [4 pages]Fluctuation-Driven Quantum Phase Transitions in Clean Itinerant FerromagnetsReceived 22 July 2002; published 25 November 2002 The quantum phase transition in clean itinerant ferromagnets is analyzed. It is shown that soft particle-hole modes invalidate Hertz’s mean-field theory for d≤3. A renormalized mean-field theory predicts a fluctuation-induced first order transition for 1<d≤3, whose stability is analyzed by renormalization group techniques. Depending on microscopic parameter values, the first order transition can be stable, or be preempted by a fluctuation-induced second order transition. The critical behavior at the latter is determined. The results are in agreement with recent experiments. © 2002 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.89.247202
DOI:
10.1103/PhysRevLett.89.247202
PACS:
75.20.En, 64.60.Kw, 75.45.+j
|
|
About | Terms and Conditions | Subscriptions | Search | Help
Use of the American Physical Society websites and journals implies that the user has read and agrees to our Terms and Conditions and any applicable Subscription Agreement. Physical Review®, Physical Review Letters®, Reviews of Modern Physics®, and Physical Review Special Topics® are trademarks of the American Physical Society.