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arXiv · 1507.07615

NMR Evidence of anisotropic Kondo liquid behavior in CeIrIn$_5$

A. C. Shockley·K. R. Shirer·J. Crocker·A. P. Dioguardi·C. H. Lin·D. M. Nisson·N. Roberts-Warren·N. J. Curro
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Abstract

We report detailed Knight shift measurements of the two indium sites in the heavy fermion compound CeIrIn$_5$ as a function of temperature and field orientation. We find that the Knight shift anomaly is orientation-dependent, with a crossover temperature $T^*$ that varies by 50% as the field is rotated from (001) to (100). This result suggests that the hybridization between the Ce 4f states and the itinerant conduction electrons is anisotropic, a result that reflects its collective origin, and may lead to anisotropic Kondo liquid behavior and unconventional superconductivity.

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A. C. Shockley, K. R. Shirer, J. Crocker, A. P. Dioguardi, C. H. Lin, D. M. Nisson, N. Roberts-Warren, N. J. Curro. 2015-07-28. NMR Evidence of anisotropic Kondo liquid behavior in CeIrIn$_5$. https://doi.org/10.1103/physrevb.92.085108

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