Kondo Effects and Multipolar Order in the Cubic PrTr2Al20 (\textit{Tr}=\text{Ti}, V)

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概要

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• Our single crystal study reveals that PrTr2Al20 (\textit{Tr}= \text{Ti} and V) provides the first examples of a cubic \Gamma_{3} nonmagnetic ground doublet system that shows the Kondo effect including a -{\ln T} dependent resistivity. The \Gamma_{3} quadrupolar moments in PrV2Al20 induce anomalous metallic behavior through hybridization with conduction electrons such as T^{1/2} dependent resistivity and susceptibility below {\sim}20 K down to its ordering temperature T_{\text{O}} = 0.6 K. In PrTi2Al20, however, quadrupoles are well-localized and exhibit an order at T_{\text{O}} = 2.0 K. Stronger Kondo coupling in PrV2Al20 than in PrTi2Al20 suppresses quadrupolar ordering, and instead promotes hybridization between the \Gamma_{3} doublet and conduction electrons, leading to most likely the quadrupolar Kondo effect.

• 2011-06-15

著者

• Nakatsuji Satoru

  Institute for Solid State Physics (ISSP), University of Tokyo, Kashiwa, Chiba 277-8581

• SAKAI Akito

  Institute for Solid State Physics, University of Tokyo, Kashiwa, Chiba 277-8581, Japan

関連論文

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• Kondo Effects and Multipolar Order in the Cubic PrTr2Al20 (\textit{Tr}=\text{Ti}, V)
• Superconductivity in the Ferroquadrupolar State in the Quadrupolar Kondo Lattice PrTi2Al20
• \muSR Evidence of Nonmagnetic Order and 141Pr Hyperfine-Enhanced Nuclear Magnetism in the Cubic \Gamma_{3} Ground Doublet System PrTi2Al20
• Pressure Dependence of Electrical Transport in the Triangular Antiferromagnetic Insulators FeGa2S4 and Fe2Ga2S5
• Possible Multiple Gap Superconductivity with Line Nodes in Heavily Hole-Doped Superconductor KFe2As2 Studied by 75As Nuclear Quadrupole Resonance and Specific Heat
• Evidence of a High-Field Phase in PrV
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