Antiferromagnetism in RuO${}_2$ as $d$-wave Pomeranchuk instability

Abstract

We present a computational study of antiferromagnetic transition in RuO${}_2$. The rutile structure with the magnetic sublattices coupled by $\pi /2$-rotation leads to a spin-polarized band structure in the antiferromagnetic state, which gives rise to a $d$-wave modulation of the Fermi surface in the spin-triplet channel. We argue a finite spin conductivity that changes sign in the $ab$ plane is expected RuO${}_2$ because of this band structure. We analyze the origin of the antiferromagnetic instability and link it to presence of a nodal line close to the Fermi level.

5 pages, 5 figures

References in corpus (4)

• Itinerant Antiferromagnetism in RuO${}_2$
• Fermi liquid instabilities in the spin channel
• Antiferromagnetism and the gap of a Mott insulator: Results from analytic continuation of the self-energy
• DFT+DMFT study on soft moment magnetism and covalent bonding in SrRu${}_2$O${}_6$

Cited by in corpus (2)

• Emergence of Fermi arcs and novel magnetic splitting in an antiferromagnet
• Essential model parameters for nonreciprocal magnons in multisublattice systems