Thouless number and spin diffusion in quantum Heisenberg ferromagnets

Details Thouless number and spin diffusion in quantum Heisenberg ferromagnets Thouless number and spin diffusion in quantum Heisenberg ferromagnets

1993-07-20

arxiv.org/abs/cond-mat/9307042v1

Physics

Condensed Matter

13 pages, written in latex MPLA2.sty (latex style distributed by International Journal of Modern Physics, the style file is gi

Scientific paper

Using an analogy between the conductivity tensor of electronic systems and the spin stiffness tensor of spin systems, we introduce the concept of the Thouless number $g_0$ and the dimensionless frequency dependent conductance $g( \omega )$ for quantum spin models. It is shown that spin diffusion implies the vanishing of the Drude peak of $g ( \omega )$, and that the spin diffusion coefficient $D_s$ is proportional to $g_0$. We develop a new method based on the Thouless number to calculate $D_s$, and present results for $D_s$ in the nearest-neighbor quantum Heisenberg ferromagnet at infinite temperatures for arbitrary dimension $d$ and spin $S$.

Affiliated with

Also associated with

No associations

Rating

Thouless number and spin diffusion in quantum Heisenberg 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 Thouless number and spin diffusion in quantum Heisenberg ferromagnets, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Thouless number and spin diffusion in quantum Heisenberg ferromagnets will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-317647