Giant Anisotropic Magnetoresistance due to Purely Orbital Rearrangement in the Quadrupolar Heavy Fermion Superconductor PrV2Al20
Yasuyuki Shimura, Qiu Zhang, Bin Zeng, Daniel Rhodes, Rico Schönemann, Masaki Tsujimoto, Yosuke Matsumoto, Akito Sakai, Toshiro Sakakibara, Koji Araki, Wenkai Zheng, Qiong Zhou, Luis Balicas, Satoru Nakatsuji
DOI 10.1103/PhysRevLett.122.256601 · Physical Review Letters
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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 PrV2Al20 with a non magnetic Γ3 doublet ground state, exhibiting antiferroquadrupole ordering below 0.7 K. For the [100] direction, we find that the high-field phase appears between 12 and 25 T, accompanied by a large jump at 12 T in the magnetoresistance (ΔMR∼100%) and in the anisotropic magnetoresistivity ratio by ∼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 antiferroquadrupole (orbital) rearrangement.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| PrV2Al20 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 0.05 | Pressure not reported | unknown |
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