Modulated Spin Liquid and Magnetic Order from a Kondo-Heisenberg model applied to $UR{u}_{2}S{i}_2$

Abstract

Within the framework of the Kondo-Heisenberg model, we analyse the effect of charge fluctuation on the modulated spin liquid (MSL) and antiferromagnetic (AF) orders which were established in a previous publication. We discuss the emergence of two quantum critical lines separating the coexisting Kondo-MSL and Kondo-MSL-AF phases. The various order parameters of the system possess a characteristic signature observable on the electronic band structure of each of the phases. We calculate that the MSL order is indeed a possible explanation of the hidden order phase of $UR{u}_{2}S{i}_2$ heavy fermion compound. Our model produces results in qualitative agreement with the experimental (T,P) phase diagram and the two gap openings in the system and quantitative agreement with the entropy and Sommerfeld coefficient evolution.

16 pages, 15 figures

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Cited by in corpus (3)

• Quasiparticle Band Structure and Spin Excitation Spectrum of the Kondo Lattice
• Superconducting Correlations in the One-Dimensional Kondo Lattice Models under Magnetic Fields
• Photo-emission signatures of coherence breakdown in Kondo alloys: dynamical mean-field theory approach