Transverse spin dynamics of a spin-polarized Fermi liquid |
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Authors: | I A Fomin |
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Institution: | (1) P. L. Kapitsa Institute of Physics Problems, Russian Academy of Sciences, 117334 Moscow, Russia |
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Abstract: | A microscopic derivation of the equations of transverse spin dynamics of a spin-polarized Fermi liquid at zero temperature
is given in the leading-order approximation in the frequencies and wave vectors characterizing the spin motion. The equations
are applicable for arbitrary degree of polarization and arbitrary deviations of the spin direction from the equilibrium orientation.
The solutions describing a coherently precessing two-domain structure and spin waves are examined. In contrast to the assertion
discussed in the literature that spin waves are damped at zero temperature, spin waves are found to be undamped in the long-wavelength
limit.
Pis’ma Zh. éksp. Teor. Fiz. 65, No. 9, 717–721 (10 May 1997) |
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Keywords: | |
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