Thermal and field-induced transitions in ferroquadrupolar Kondo systems

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Recent experiments have examined the impact of a magnetic field on ferroquadrupolar orders in the intermetallic Kondo material PrTi2Al20. Motivated by this, we use extensive Monte Carlo simulations to study a diamond lattice XY model of non-Kramers pseudospin-1/2 Pr3+ moments which crucially incorporates three-spin interactions. This model supports a thermal Z3 Potts ordering transition upon cooling from the paramagnetic phase into the ferroquadrupolar phase. An applied magnetic field along the [110] direction leads to a thermal Ising transition out of the quadrupolar ordered phase. A magnetic field along the [001] direction leads to only thermal crossovers, but supports a spinodal transition out of metastable domains which could be strongly pinned by coupling to elastic lattice deformations. We propose noise measurements as a potential probe to “hear” the spinodal transition. Our work highlights the importance of multispin interactions in Kondo materials near the small-to-large Fermi surface transition.
Publisher
AMER PHYSICAL SOC
Issue Date
2020-09
Language
English
Article Type
Article
Citation

PHYSICAL REVIEW RESEARCH, v.2, no.3, pp.033176

ISSN
2643-1564
DOI
10.1103/PhysRevResearch.2.033176
URI
http://hdl.handle.net/10203/276068
Appears in Collection
PH-Journal Papers(저널논문)
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