Campus Units

Physics and Astronomy, Ames Laboratory

Document Type

Article

Publication Version

Published Version

Publication Date

5-1-2011

Journal or Book Title

Physical Review B

Volume

83

Issue

18

First Page

180408(R)

DOI

10.1103/PhysRevB.83.180408

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.

Copyright Owner

American Physical Society

Language

en

File Format

application/pdf

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