Quantum-critical behavior of itinerant ferromagnets

Details Quantum-critical behavior of itinerant ferromagnets Quantum-critical behavior of itinerant ferromagnets

2003-11-18

arxiv.org/abs/cond-mat/0311420v1

Phys. Rev. Lett. 92, 147003 (2004)

Physics

Condensed Matter

Strongly Correlated Electrons

5 pages, 1 eps figure

Scientific paper

10.1103/PhysRevLett.92.147003

We study the stability of the Quantum Critical Point (QCP) for itinerant ferromagnets commonly described by the Hertz-Millis-Moriya (HMM) theory. We argue that in $D \leq 3$, long-range spatial correlations associated with the Landau damping of the order parameter field generate a universal {\it negative}, non-analytic $|q|^{(D+1)/2}$ contribution to the static magnetic susceptibility $\chi_s (q, 0)$, which makes HMM theory unstable. We argue that the actual transition is either towards incommensurate ordering, or first order. We also show that singular corrections are specific to the spin problem, while charge susceptibility remains analytic at criticality.

Affiliated with

Also associated with

No associations

Rating

Quantum-critical behavior of itinerant ferromagnets does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Quantum-critical behavior of itinerant ferromagnets, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Quantum-critical behavior of itinerant ferromagnets will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-339864