Multiple regions of quantum criticality in YbAgGe
Date
Authors
Major Professor
Advisor
Committee Member
Journal Title
Journal ISSN
Volume Title
Publisher
Authors
Research Projects
Organizational Units
Journal Issue
Is Version Of
Versions
Series
Department
Abstract
Dilation and thermopower measurements on YbAgGe, a heavy-fermion antiferromagnet, clarify and refine the magnetic-field temperature (H-T) phase diagram and reveal a field-induced phase with T-linear resistivity. On the low-H side of this phase we find evidence for a first-order transition and suggest that YbAgGe at 4.5 T may be close to a quantum critical end point. On the high-H side our results are consistent with a second-order transition suppressed to a quantum critical point near 7.2 T. We discuss these results in light of global phase diagrams proposed for Kondo lattice systems.
Comments
This article is published as Schmiedeshoff, G. M., E. D. Mun, A. W. Lounsbury, S. J. Tracy, E. C. Palm, S. T. Hannahs, J-H. Park, T. P. Murphy, S. L. Bud’ko, and P. C. Canfield. "Multiple regions of quantum criticality in YbAgGe." Physical Review B 83, no. 18 (2011): 180408. DOI: 10.1103/PhysRevB.83.180408. Posted with permission.