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arXiv · 1709.06094

Two-stage multipolar ordering in Pr(TM)$_2$Al$_{20}$ Kondo materials

Frederic Freyer·Jan Attig·SungBin Lee·Arun Paramekanti·Simon Trebst·Yong Baek Kim
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Abstract

Among heavy fermion materials, there is a set of rare-earth intermetallics with non-Kramers Pr$^{3+}$ $4f^2$ moments which exhibit a rich phase diagram with intertwined quadrupolar orders, superconductivity, and non-Fermi liquid behavior. However, more subtle broken symmetries such as multipolar orders in these Kondo materials remain poorly studied. Here, we argue that multi-spin interactions between local moments beyond the conventional two-spin exchange must play an important role in Kondo materials near the ordered to heavy Fermi liquid transition. We show that this drives a plethora of phases with coexisting multipolar orders and multiple thermal phase transitions, providing a natural framework for interpreting experiments on the Pr(TM)$_2$Al$_{20}$ class of compounds.

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Frederic Freyer, Jan Attig, SungBin Lee, Arun Paramekanti, Simon Trebst, Yong Baek Kim. 2017-09-18. Two-stage multipolar ordering in Pr(TM)$_2$Al$_{20}$ Kondo materials. https://doi.org/10.1103/physrevb.97.115111

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