IrF4: From Tetrahedral Compass Model to Topological Semimetal

Abstract

The intersection of topology, symmetry, and magnetism yields a rich structure of possible phases. In this work, we study theoretically the consequences of magnetism on IrF4, which was recently identified as a possible candidate topological nodal chain semimetal in the absence of magnetic order. We show that the spin-orbital nature of the Ir moments gives rise to strongly anisotropic magnetic couplings resembling a tetrahedral compass model on a diamond lattice. The predicted magnetic ground state preserves key symmetries protecting the nodal lines, such that they persist into the ordered phase at the mean-field level. The consequences for other symmetry reductions are also discussed.

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Cited by in corpus (4)

• Altermagnetic Instabilities from Quantum Geometry
• Intrinsic defect intolerance in the ultra-pure metal PtSn${}_4$
• Nodal-line semimetals and their variance
• Fate of Bosonic Topological Edge Modes in the Presence of Many-Body Interactions