New Evidence for Zero-Temperature Relaxation in a Spin-Polarized Fermi Liquid

Details New Evidence for Zero-Temperature Relaxation in a Spin-Polarized Fermi Liquid New Evidence for Zero-Temperature Relaxation in a Spin-Polarized Fermi Liquid

2002-09-10

arxiv.org/abs/cond-mat/0209222v2

Physics

Condensed Matter

4 pages, 4 figures; for v2 added one sentence in discussion "It is possible that the spin dynamics are modified..." and added

Scientific paper

10.1103/PhysRevLett.90.105301

Spin-echo experiments are reported for 3He-4He solutions under extremely high B/T conditions, B=14.75 T and T >= 1.73 mK. The 3He concentration x_3 was adjusted close to the value x_c = 3.8% at which the spin rotation parameter muM_0 vanishes. In this way the transverse and longitudinal spin diffusion coefficients D_perp, D_parallel were measured while keeping |muM_0| < 1. It is found that the temperature dependence of D_perp deviates strongly from 1/T^2, with anisotropy temperature T_a = 4.26 +/- 0.18 mK. This value is close to the theoretical prediction for dilute solutions, and suggests that spin current relaxation remains finite as the temperature tends to zero.

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