: Pronounced Non-Fermi-Liquid Effects above a Low-Lying Magnetic Phase Transition
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- 17 July 2000
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 85 (3), 626-629
- https://doi.org/10.1103/physrevlett.85.626
Abstract
We report the first observation of non-Fermi-liquid (NFL) effects in a clean Yb compound at ambient pressure and zero magnetic field. The electrical resistivity and the specific-heat coefficient of high-quality single crystals of present a linear and a logarithmic temperature dependence, respectively, in more than a decade in temperature. We ascribe this NFL behavior to the presence of (presumably) quasi-2D antiferromagnetic spin fluctuations related to a very weak magnetic phase transition at . Application of hydrostatic pressure induces anomalies in the electrical resistivity, indicating the stabilization of magnetic order.
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