Kondo Effects and Multipolar Order in the cubic PrTr2Al20 (Tr=Ti, V)

Abstract

Our single crystal study reveals that PrTr2Al20 (Tr = Ti and V) provides the first examples of a cubic Γ3 nonmagnetic ground doublet system that shows the Kondo effect including a -ln T dependent resistivity. The Γ3 quadrupolar moments in PrV2Al20 induce anomalous metallic behavior through hybridization with conduction electrons, such as T^{1/2} dependent resistivity and susceptibility below ~ 20 K down to its ordering temperature T_O = 0.6 K. In PrTi2Al20, however, quadrupoles are well-localized and exhibit an order at T_O = 2.0 K. Stronger Kondo coupling in PrV2Al20 than in PrTi2Al20 suppresses quadrupolar ordering, and instead promotes hybridization between the Γ3 doublet and conduction electrons, leading to most likely the quadrupolar Kondo effect.

12 pages, 4 figures

Cited by in corpus (106)

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• Unusual Field-Insensitive Phase Transition and Kondo Behavior in SmTi${}_2$Al${}_{20}$
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• Strong Valence Fluctuation Effects in Sm$T{r}_2$Al${}_{20}$($Tr=$Ti, V, Cr)
• Unveiling Hidden Orders: Magnetostriction as a Probe of Multipolar-Ordered States
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• Landau theory of multipolar orders in Pr(TM)${}_2$X${}_{20}$ Kondo materials
• Triplet pairing mechanisms from Hund's-Kondo models: applications to UTe${}_2$ and CeRh${}_2$As${}_2$
• Low-Energy Optical Phonon Modes in the Caged Compound LaRu2Zn20
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• Preserved entropy and fragile magnetism
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• Two-channel Kondo Effect Emerging from Nd Ions
• Field-Induced Switching of Ferro-Quadrupole Order Parameter in PrTi2Al20
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• Fully gapped s-wave superconductivity enhanced by magnetic criticality in heavy fermion system
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