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arXiv · 1412.4120

Field-Induced Quadrupolar Quantum Criticality in PrV2Al20

Yasuyuki Shimura·Masaki Tsujimoto·Bin Zeng·Luis Balicas·Akito Sakai·Satoru Nakatsuji
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Abstract

PrV2Al20 is the heavy fermion superconductor based on the cubic Gamma3 doublet that exhibits non- magnetic quadrupolar ordering below ~ 0.6 K. Our magnetotransport study on PrV2Al20 reveals field-induced quadrupolar quantum criticality at Hc ~ 11 T applied along the [111] direction. Near the critical field Hc required to suppress the quadrupolar state, we find a marked enhancement of the resistivity rho(H, T), a divergent effective mass of quasiparticles and concomitant non-Fermi liquid (NFL) behavior (i.e. rho(T) ~ T^n with n < 0.5). We also observe the Shubnikov de Haas-effect above ?Hc, indicating the enhanced effective mass m/m0 ~ 10. This reveals the competition between the nonmagnetic Kondo effect and the intersite quadrupolar coupling, leading to the pronounced NFL behavior in an extensive region of T and H emerging from the quantum critical point.

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Yasuyuki Shimura, Masaki Tsujimoto, Bin Zeng, Luis Balicas, Akito Sakai, Satoru Nakatsuji. 2014-12-12. Field-Induced Quadrupolar Quantum Criticality in PrV2Al20. https://arxiv.org/abs/1412.4120

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