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arXiv · 1805.03817

Giant Anisotropic Magnetoresistance due to Purely Orbital Rearrangement in the Quadrupolar Heavy Fermion Superconductor PrV$_2$Al$_{20}$

Yasuyuki Shimura·Qiu Zhang·Bin Zeng·Daniel Rhodes·Rico Uwe Schonemann·Masaki Tsujimoto·Yosuke Matsumoto·Akito Sakai·Toshiro Sakakibara·Koji Araki·Wenkai Zheng·Qiong Zhou·Luis Balicas·Satoru Nakatsuji
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Abstract

We report the discovery of giant and anisotropic magnetoresistance due to the orbital rearrangement in a non-magnetic correlated metal. In particular, we measured the magnetoresistance under fields up to 31.4 T in the cubic Pr-based heavy fermion superconductor PrV$_2$Al$_{20}$ with a non-magnetic $\Gamma _3$ doublet ground state, exhibiting antiferro-quadrupole ordering below 0.7 K. For the [100] direction, we find that the high-field phase appears between 12 T and 25 T, accompanied by a large jump at 12 T in the magnetoresistance ($\Delta MR \sim $ 100 $\% $) and in the anisotropic magnetoresistivity (AMR) ratio by $\sim $ 20 $\% $. These observations indicate that the strong hybridization between the conduction electrons and anisotropic quadrupole moments leads to the Fermi surface reconstruction upon crossing the field-induced antiferro-quadrupole (orbital) rearrangement.

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Yasuyuki Shimura, Qiu Zhang, Bin Zeng, Daniel Rhodes, Rico Uwe Schonemann, Masaki Tsujimoto, Yosuke Matsumoto, Akito Sakai, Toshiro Sakakibara, Koji Araki, Wenkai Zheng, Qiong Zhou, Luis Balicas, Satoru Nakatsuji. 2018-05-10. Giant Anisotropic Magnetoresistance due to Purely Orbital Rearrangement in the Quadrupolar Heavy Fermion Superconductor PrV$_2$Al$_{20}$. https://doi.org/10.1103/physrevlett.122.256601

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