Strange metals develop near quantum critical points in a variety of strongly correlated systems. Some of the issues that are central to the field include how the quantum critical state loses quasiparticles, how it drives superconductivity and to what extent the strange-metal physics in different classes of correlated systems are interconnected. In this Review, we survey some of these issues from the vantage point of heavy-fermion metals. We describe the notion of Kondo destruction and how it leads to several crucial effects. These include a transformation of the Fermi surface from large to small when the system is tuned across the quantum critical point, a loss of quasiparticles everywhere on the Fermi surface when it is perched at the quantum critical point and a dynamical Planckian scaling in various physical properties including charge responses. We close with a discussion about the connections between the strange-metal physics in heavy-fermion metals and its counterparts in the cuprates and other correlated materials.

奇异金属在各种强相关系统中的量子临界点附近发育。该领域的核心问题包括量子临界态如何失去准粒子，它如何驱动超导性，以及不同类别的相关系统中的奇异金属物理学在多大程度上相互关联。在这篇综述中，我们从重费米子金属的有利位置研究了其中的一些问题。我们描述了近藤破坏的概念以及它如何导致几个关键影响。这些变化包括当系统在量子临界点上调谐时费米表面从大到小的转变，当费米表面位于量子临界点时，费米表面上到处都是准粒子的损失，以及包括电荷响应在内的各种物理性质的动力学普朗克缩放。最后，我们讨论了重费米子金属中的奇异金属物理学与铜酸盐和其他相关材料中的奇金属物理学之间的联系。