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arXiv · 0907.0967

Anisotropic inelastic scattering and its interplay with superconductivity in URu$_{2}$Si$_{2}$

Zengwei Zhu·Elena Hassinger·Zhu'an Xu·Dai Aoki·Jacques Flouquet·Kamran Behnia
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Abstract

In contrast to almost all anisotropic superconductors, the upper critical field of URu$_{2}$Si$_{2}$ is larger when the field is oriented along the less conducting direction. We present a study of resistivity and Seebeck coefficient extended down to sub-Kelvin temperature range uncovering a singular case of anisotropy. When the current is injected along the c-axis URu$_{2}$Si$_{2}$ behaves as a low-density Fermi liquid. When it flows along the a-axis, even in presence of a large field, resistivity remains T-linear down to T$_{c}$ and the Seebeck coefficient undergoes a sign change at very low temperatures. We conclude that the characteristic energy scale is anisotropic and vanishingly small in the basal plane.

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Zengwei Zhu, Elena Hassinger, Zhu'an Xu, Dai Aoki, Jacques Flouquet, Kamran Behnia. 2009-07-06. Anisotropic inelastic scattering and its interplay with superconductivity in URu$_{2}$Si$_{2}$. https://doi.org/10.1103/physrevb.80.172501

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