重电子材料中的量子临界行为。
Quantum critical behavior in heavy electron materials.
机构信息
Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;Collaborative Innovation Center of Quantum Matter, Beijing 100190, China; and
Santa Fe Institute and Department of Physics, University of California, Davis, CA 95616
出版信息
Proc Natl Acad Sci U S A. 2014 Jun 10;111(23):8398-403. doi: 10.1073/pnas.1407561111. Epub 2014 May 27.
Quantum critical behavior in heavy electron materials is typically brought about by changes in pressure or magnetic field. In this paper, we develop a simple unified model for the combined influence of pressure and magnetic field on the effectiveness of the hybridization that plays a central role in the two-fluid description of heavy electron emergence. We show that it leads to quantum critical and delocalization lines that accord well with those measured for CeCoIn5, yields a quantitative explanation of the field and pressure-induced changes in antiferromagnetic ordering and quantum critical behavior measured for YbRh2Si2, and provides a valuable framework for describing the role of magnetic fields in bringing about quantum critical behavior in other heavy electron materials.
在重电子材料中，量子临界行为通常是由压力或磁场的变化引起的。在本文中，我们开发了一个简单的统一模型，用于研究压力和磁场对在重电子出现的两流体描述中起核心作用的杂化有效性的综合影响。我们表明，它导致了量子临界和离域线，与测量到的 CeCoIn5 相符，对 YbRh2Si2 中测量到的反铁磁序和量子临界行为的场和压力诱导变化给出了定量解释，并为描述磁场在其他重电子材料中引起量子临界行为的作用提供了一个有价值的框架。
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