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arXiv · 1607.07945

Magneto-transport properties of CeRu$_2$Al$_{10}$: Similarities to URu$_2$Si$_2$

Jiahao Zhang·Sile Hu·Hengcan Zhao·Pu Wang·A. M. Strydom·Jianlin Luo·Frank Steglich·Peijie Sun
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Abstract

We report on magneto-transport properties of the Kondo semiconducting compound CeRu$_2$Al$_{10}$, focusing on its exotic phase below $T_0$ = 27 K. In this phase, an excess thermal conductivity $\kappa$ emerges and is gradually suppressed by magnetic field, strikingly resembling those observed in the hidden-order phase of URu$_2$Si$_2$. Our analysis indicates that low-energy magnetic excitation is the most likely origin, as was also proposed for URu$_2$Si$_2$ recently, despite the largely reduced magnetic moments. Likewise, other transport properties such as resistivity, thermopower and Nernst effect exhibit distinct features characterizing the very different charge dynamics above and below $T_0$, sharing similarities to URu$_2$Si$_2$, too. Given the exotic nature of the ordered phases in both compounds, whether a unified interpretation to all these observations exists appears to be extremely interesting.

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Jiahao Zhang, Sile Hu, Hengcan Zhao, Pu Wang, A. M. Strydom, Jianlin Luo, Frank Steglich, Peijie Sun. 2016-07-27. Magneto-transport properties of CeRu$_2$Al$_{10}$: Similarities to URu$_2$Si$_2$. https://doi.org/10.1103/physrevb.94.235120

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