Quantum critical behavior in heavy electron materials is typically brought about by changes in pressure or magnetic field. In this communication, 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.
@article{arxiv.1404.4672,
title = {Quantum critical behavior in heavy electron materials},
author = {Yi-feng Yang and David Pines},
journal= {arXiv preprint arXiv:1404.4672},
year = {2014}
}
Comments
29 pages, 6 figures, with minor corrections, submitted to PNAS