Competing orders, competing anisotropies, and multicriticality: The case of Co-dopedYbRh2Si2

2013/12/16 by Eric C. Andrade, Manuel Brando, M. Brando +3
Chemistry · Materials Science · Physics and Astronomy · #Anisotropy #Antiferromagnetism #Chemistry #Condensed matter physics #Crystallography #Doping #Ferromagnetism #Heisenberg model #Iron-based superconductors research #Physics #Physics of Superconductivity and Magnetism #Quantum mechanics #Rare-earth and actinide compounds #cond-mat.str-el

paper · pdf · doi:10.1103/physrevb.90.075138

published as Phys. Rev. B 90, 075138 (2014) · 8 pages, 5 figures

arxiv created 2013/12/16 · openalex publication_date 2014/08/22 · arxiv updated 2014/08/27 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

Motivated by the unusual evolution of magnetic phases in stoichiometric and Co-doped YbRh₂Si₂, we study Heisenberg models with competing ferromagnetic and antiferromagnetic ordering combined with competing anisotropies in exchange interactions and g factors. Utilizing large-scale classical Monte Carlo simulations, we analyze the ingredients required to obtain the characteristic crossing point of uniform susceptibilities observed experimentally near the ferromagnetic ordering of Yb(Rh_0.73Co_0.27)₂Si₂. The models possess multicritical points, which we speculate to be relevant for the behavior of clean as well as doped YbRh₂Si₂. We also make contact with experimental data on YbNi₄P₂, where a similar susceptibility crossing has been observed.

Citations

• Multicritical points in the three-dimensional XXZ antiferromagnet with single-ion anisotropy
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