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arXiv · 0704.2412

Giant viscosity enhancement in a spin-polarized Fermi liquid

H. Akimoto·J. S. Xia·D. Candela·W. J. Mullin·E. D. Adams·N. S. Sullivan
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Abstract

The viscosity is measured for a Fermi liquid, a dilute $^3$He-$^4$He mixture, under extremely high magnetic field/temperature conditions ($B \leq 14.8$ T, $T \geq 1.5$ mK). The spin splitting energy $μB$ is substantially greater than the Fermi energy $k_B T_F$; as a consequence the polarization tends to unity and s-wave quasiparticle scattering is suppressed for $T \ll T_F$. Using a novel composite vibrating-wire viscometer an enhancement of the viscosity is observed by a factor of more than 500 over its low-field value. Good agreement is found between the measured viscosity and theoretical predictions based upon a $t$-matrix formalism.

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H. Akimoto, J. S. Xia, D. Candela, W. J. Mullin, E. D. Adams, N. S. Sullivan. 2007-04-18. Giant viscosity enhancement in a spin-polarized Fermi liquid. https://doi.org/10.1103/physrevlett.99.095301

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