Theory of transverse spin dynamics in a polarized Fermi liquid and an itinerant ferromagnet

Details Theory of transverse spin dynamics in a polarized Fermi liquid and an itinerant ferromagnet Theory of transverse spin dynamics in a polarized Fermi liquid and an itinerant ferromagnet

2005-07-28

arxiv.org/abs/cond-mat/0507675v1

Physics

Condensed Matter

Strongly Correlated Electrons

7 pages, no figures

Scientific paper

The linear equations for transverse spin dynamics in a weakly polarized degenerate Fermi liquid with arbitrary relationship between temperature and polarization are derived from Landau-Silin phenomenological kinetic equation with general form of two-particle collision integral. Unlike the previous treatment where Fermi velocity and density of states have been taken as constants independent of polarization here we made derivation free from this assumption. The obtained equations are applicable for description of spin dynamics in paramagnetic Fermi liquid with finite polarization as well in an itinerant ferromagnet. In both cases transverse spin wave frequency is found to be proportional to the square of the wave vector with complex constant of proportionality (diffusion coefficient) such that the damping has a finite value at T=0. The polarization dependence of the diffusion coefficient is found to be different for a polarized Fermi liquid and for an itinerant ferromagnet. These conclusions are confirmed by derivation of transverse spin wave dispersion law in frame of field theoretical methods from the integral equation for the vortex function. It is shown that similar derivation taking into consideration the divergency of static transverse susceptibility also leads to the same attenuating spin wave spectrum.

Affiliated with

Also associated with

No associations

Rating

Theory of transverse spin dynamics in a polarized Fermi liquid and an itinerant ferromagnet 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 Theory of transverse spin dynamics in a polarized Fermi liquid and an itinerant ferromagnet, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Theory of transverse spin dynamics in a polarized Fermi liquid and an itinerant ferromagnet will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-46462