Spin drag in ultracold Fermi mixtures with repulsive interactions

被引：7

作者：

Duine, R. A. ^{[1
]}

Polini, M. ^{[2
,3
]}

Raoux, A. ^{[4
]}

Stoof, H. T. C. ^{[1
]}

Vignale, G. ^{[5
]}

机构：

[1] Univ Utrecht, Inst Theoret Phys, NL-3584 CE Utrecht, Netherlands

[2] CNR, Ist Nanosci, NEST, I-56126 Pisa, Italy

[3] Scuola Normale Super Pisa, I-56126 Pisa, Italy

[4] Format Interuniv Phys, Ecole Normale Super, Dept Phys, F-75231 Paris 05, France

[5] Univ Missouri, Dept Phys & Astron, Columbia, MO 65211 USA

来源：

NEW JOURNAL OF PHYSICS | 2011年 / 13卷

基金：

欧洲研究理事会; 美国国家科学基金会;

关键词：

COULOMB DRAG; ELECTRON; GAS;

D O I：

10.1088/1367-2630/13/4/045010

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We calculate the spin-drag relaxation rate for a two-component ultracold atomic Fermi gas with positive scattering length between the two-spin components. In one dimension, we find that it vanishes linearly with temperature. In three dimensions, the spin-drag relaxation rate vanishes quadratically with temperature for sufficiently weak interactions. This quadratic temperature dependence is present, up to logarithmic corrections, in the two-dimensional (2D) case as well. For stronger interaction, the system exhibits a Stoner ferromagnetic phase transition in two and three dimensions. We show that the spin-drag relaxation rate is enhanced by spin fluctuations as the temperature approaches the critical temperature of this transition from above.

引用

页数：10

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