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arXiv 1105.2552cond-mat.str-el
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量子临界点附近的拓扑交叉

Topological crossovers near a quantum critical point

V. A. Khodel, J. W. Clark, M. V. Zverev

摘要:

研究了均匀强关联费米系统的单粒子能谱$ε(p)$和准粒子动量分布$n(p)$的温度演化,当朗道态稳定的必要条件被破坏时,费米面由于拓扑交叉而变得多连通.注意力集中在不同的非费米液体的温度制度所经历的一个阶段表现出一个单一的额外的空穴袋相比,传统的朗道状态。提出了一个临界实验来解释液态$^3$ He致密膜中NFL行为的起源。

英文摘要:

We study the temperature evolution of the single-particle spectrum $ε(p)$ and quasiparticle momentum distribution $n(p)$ of homogeneous strongly correlated Fermi systems beyond a point where the necessary condition for stability of the Landau state is violated, and the Fermi surface becomes multi-connected by virtue of a topological crossover. Attention is focused on the different non-Fermi-liquid temperature regimes experienced by a phase exhibiting a single additional hole pocket compared with the conventional Landau state. A critical experiment is proposed to elucidate the origin of NFL behavior in dense films of liquid $^3$He.

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。

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