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Journal of the Korean Physical Society

, Volume 63, Issue 3, pp 398–400 | Cite as

Low temperature transport properties of the quadrupolar Kondo lattice system PrTi2Al20

  • Akito Sakai
  • Satoru NakatsujiEmail author
Article

Abstract

We have investigated the low temperature transport properties of the cubic Γ3 compound PrTi2Al20. This is a quadrupolar Kondo lattice system where the nongmagnetic quadrupoles, which form a long-range order at low temperatures, have strong hybridization with the conduction electrons. A sharp drop of the resistivity due to a ferroquadrupole ordering is observed at T Q = 2.0 K. The T 2 dependence of the resistivity and the large Sommerfeld coefficient γ above T Q suggest the formation of a heavy-fermion state. The temperature dependence of the resistivity below T Q does not show a power law but exponential law behavior, indicating the emergence of an anisotropy gap Δ in the collective mode associated with the ferroquadrupole order below T Q. The Fisher-Langer relation holds around T Q, suggesting the higher order scattering processes than those in Born approximation are not dominant for this ferroquadrupole ordering.

Keywords

PrTr2Al20 Quadrupolar Kondo lattice Nonmagnetic Kondo effect Quadrupolar order 

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Copyright information

© The Korean Physical Society 2013

Authors and Affiliations

  1. 1.Institute for Solid State PhysicsUniversity of TokyoKashiwaJapan

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