Hidden covalent insulator and spin excitations in SrRu${}_2$O${}_6$

Abstract

The density functional plus dynamical mean-field theory is used to study the spin excitation spectra of SrRu${}_2$O${}_6$. A good quantitative agreement with experimental spin excitation spectra is found. Depending on the size of the Hund's coupling $J_H$ the systems chooses either Mott insulator or covalent insulator state when magnetic ordering is not allowed. We find that the nature of the paramagnetic state has negligible influence on the charge and spin excitation spectra. We find that antiferromagnetic correlations hide the covalent insulator state for realistic choices of the interaction parameters.

8 pages, 7 figures

References in corpus (17)

• Continuous-time Monte Carlo methods for quantum impurity models
• Novel Jeff = 1/2 Mott State Induced by Relativistic Spin-Orbit Coupling in Sr2IrO4
• Strong electronic correlations from Hund's coupling
• Magnetic Moment Collapse-Driven Mott Transition in MnO
• Bond disproportionation and dynamical charge fluctuations in the perovskite rare earth nickelates
• Updated Core Libraries of the ALPS Project
• Antiferromagnetism and the gap of a Mott insulator: Results from analytic continuation of the self-energy
• Magnetic Anisotropy in Spin-3/2 with Heavy Ligand in Honeycomb Mott Insulators: Application to CrI${}_3$
• Temperature dependent correlations in covalent insulators
• Correlations in a band insulator
• Spin waves and spin-state transitions in a ruthenate high-temperature antiferromagnet
• DFT+DMFT study on soft moment magnetism and covalent bonding in SrRu${}_2$O${}_6$
• X-ray spectroscopy of rare-earth nickelate LuNiO${}_3$: LDA+DMFT study
• DCore: Integrated DMFT software for correlated electrons
• Competing spin-orbital singlet states in the 4$d^4$ honeycomb ruthenate Ag${}_3$LiRu${}_2$O${}_6$
• Single- and Multimagnon Dynamics in Antiferromagnetic $\alpha$-Fe${}_2$O${}_3$ Thin Films
• Theoretical analysis of single-ion anisotropy in $d^3$ Mott insulators

Cited by in corpus (2)

• Antiferromagnetic resonance in $\alpha$-MnTe
• High temperature antiferromagnetism in ultrathin SrRu2O6 nanosheets