Spin waves and spin diffusion in Fermi liquids: Bounds on effective diffusion coefficients

Kevin S. Bedell, David Meltzer

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

We investigate the accuracy of the usual relaxation-time approximations, involving the spin-diffusion lifetime D, which are generally made in analyses of spin waves and the Leggett-Rice effect in Fermi liquids. By employing the variational methods of Ah-Sam, Ho/jgaard-Jensen, and Smith and of Egilsson and Pethick, we are able to determine upper and lower bounds on the effective diffusion coefficient resulting from spin-wave phenomena which are accurate in the whole Fermi-liquid regime (TTF). Our results indicate that the usual approximations break down for T7 mK in He3, but are accurate to within 2% in 5% -43He mixtures. Our results are consistent with values of F1a-0.6 at 0 bar, -0.4 at 27 bars in He3, but these have considerable uncertainties.

Original languageEnglish (US)
Pages (from-to)4543-4556
Number of pages14
JournalPhysical Review B
Volume33
Issue number7
DOIs
StatePublished - 1986
Externally publishedYes

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Fermi liquids
Spin waves
magnons
diffusion coefficient
rice
approximation
Relaxation time
breakdown
relaxation time
life (durability)
Uncertainty

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Spin waves and spin diffusion in Fermi liquids : Bounds on effective diffusion coefficients. / Bedell, Kevin S.; Meltzer, David.

In: Physical Review B, Vol. 33, No. 7, 1986, p. 4543-4556.

Research output: Contribution to journalArticle

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