arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1306.5078cond-mat.mes-hall
收藏

二级相变附近拖曳电阻率的统一玻尔兹曼输运理论

Unified Boltzmann-transport theory for the drag resistivity close to a second-order phase transition

M. P. Mink, H. T. C. Stoof, R. A. Duine, Marco Polini, G. Vignale

摘要:

我们提出了一个统一的玻尔兹曼输运理论的阻力在两个组件系统接近二阶相变。我们发现在两个和三个空间维度的阻力系数的一般表达式,为任意人口和质量不平衡,颗粒和孔状带,并显示如何纳入,在高斯水平上,波动的影响接近相变。我们发现,接近的相变增强阻力接近临界温度从上面,我们定性地推导出这种增强的温度依赖性的各种情况下。此外,我们提出了两个具体的实验系统的数值计算结果:i)三维冷原子费米气体接近的Stoner过渡和ii)二维空间分离的电子和空穴系统的半导体双量子阱。

英文摘要:

We present a unified Boltzmann-transport theory for the drag resistivity in two-component systems close to a second-order phase transition. We find general expressions for the drag resistivity in two and three spatial dimensions, for arbitrary population and mass imbalance, for particle- and hole-like bands, and show how to incorporate, at the Gaussian level, the effect of fluctuations close to a phase transition. We find that the proximity to the phase transition enhances the drag resistivity upon approaching the critical temperature from above, and we qualitatively derive the temperature dependence of this enhancement for various cases. In addition, we present numerical results for two concrete experimental systems: i) three-dimensional cold atomic Fermi gases close to a Stoner transition and ii) two-dimensional spatially-separated electron and hole systems in semiconductor double quantum wells.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑