THEORY OF SPIN DIFFUSION OF DILUTE, POLARIZED FERMIONS FOR ALL TEMPERATURES

Publication Date

1987

Journal or Book Title

JOURNAL OF LOW TEMPERATURE PHYSICS

Abstract

We describe the solution of the transport equation over the entire range of temperature from the Boltzmann to fully degenerate regimes for dilute, polarized Fermi systems. Since spin-polarized systems can show unusual quantum effects involving spin rotation in both Boltzmann and degenerate regimes, a solution of the kinetic equation over the whole temperature range is expected to be useful. Our results for the longitudinal spin diffusion coefficient reduce to the known limits in the Boltzmann and degenerate regimes and also to the expected form in the peculiar high-polarization regime in which one spin species is degenerate and the other described by classical statistics (the degenerate-classical case). We derive numerical results for the spin-rotation quality parameter mgr over the full temperature range. Unlike experimental results that show mgr diminishing anomalously as the temperature decreases toward the degenerate regime, our value for mgr is monotonically increasing. However, the transition to the degenerate-classical regime is found to occur with a rounded-step jump in mgr as a function of polarization.

Comments

The published version is located at http://www.springerlink.com/content/l3p6vx36563p083t/

Pages

421-440

Volume

67

Issue

5-6

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