Scaling behavior of heavy fermion metals
Scaling behavior of heavy fermion metals
复制标题
重费米子金属的结垢行为
DOI：
10.1016/j.physrep.2010.03.001
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发表时间：
2010
期刊：
影响因子：
--
通讯作者：
K. Popov
中科院分区：
文献类型：
--
作者：
V. Shaginyan;V. Shaginyan;M. Amusia;A. Msezane;K. Popov
强关联费米系统是物理学中最好的实验研究的基本系统，直到最近还缺乏理论解释。本文讨论了强关联费米系统，如重费米子(HF)金属和二维费米(2D)费米系统的理论构建和现象分析。结果表明，HF金属的基本性质和标度行为可以在费米子凝聚量子相变(FCQPT)和扩展的准粒子范式的框架内描述，这使得我们能够解释在强关联费米系统中观察到的非费米液体行为。与朗道范式认为准粒子的有效质量是一个常数相反，新的准粒子的有效质量强烈地依赖于温度、磁场、压力和其他参数。在分析了收集到的具有完全不同微观性质的强关联费米系统的事实后，我们发现这些系统在FCQPT表现出相同的非费米液体行为。我们从理论上和实验上证明了在不同的强关联费米系统上收集的数据具有普遍的标度行为，而具有强关联费米子的材料在多样性上出人意料地是一致的。我们对强关联系统，如HF金属和二维费米系统的分析是在显著的实验结果的背景下进行的。我们对非费米液体行为、标度以及热力学、弛豫和输运性质的计算与实验事实符合得很好。
Strongly correlated Fermi systems are fundamental systems in physics that are best studied experimentally, which until very recently have lacked theoretical explanations. This review discusses the construction of a theory and the analysis of phenomena occurring in strongly correlated Fermi systems such as heavy-fermion (HF) metals and two-dimensional (2D) Fermi systems. It is shown that the basic properties and the scaling behavior of HF metals can be described within the framework of a fermion condensation quantum phase transition (FCQPT) and an extended quasiparticle paradigm that allow us to explain the non-Fermi liquid behavior observed in strongly correlated Fermi systems. In contrast to the Landau paradigm stating that the quasiparticle effective mass is a constant, the effective mass of new quasiparticles strongly depends on temperature, magnetic field, pressure, and other parameters. Having analyzed the collected facts on strongly correlated Fermi systems with quite a different microscopic nature, we find these to exhibit the same non-Fermi liquid behavior at FCQPT. We show both analytically and using arguments based entirely on the experimental grounds that the data collected on very different strongly correlated Fermi systems have a universal scaling behavior, and materials with strongly correlated fermions can unexpectedly be uniform in their diversity. Our analysis of strongly correlated systems such as HF metals and 2D Fermi systems is in the context of salient experimental results. Our calculations of the non-Fermi liquid behavior, the scales and thermodynamic, relaxation and transport properties are in good agreement with experimental facts.