Spin-orbital locked magnetic excitations in a half-metallic double perovskite Ba2FeReO6

Abstract

We present a powder inelastic neutron scattering study of magnetic excitations in Ba${}_2$FeReO${}_6$, a member of the double perovskite family of materials which exhibit half-metallic behavior and high Curie temperatures. We find clear evidence of two well-defined dispersing magnetic modes in its low temperature ferrimagnetic state. We develop a local moment model, which incorporates the interaction of Fe spins with spin-orbit locked magnetic moments on Re, and show that this captures our experimental observations. Our study further opens up double perovskites as model systems to explore the interplay of strong correlations and spin-orbit coupling in 5d transition metal oxides.

7 pages 5 figures

References in corpus (9)

• Mott Insulators in the Strong Spin-Orbit Coupling Limit: From Heisenberg to a Quantum Compass and Kitaev Models
• Novel Jeff = 1/2 Mott State Induced by Relativistic Spin-Orbit Coupling in Sr2IrO4
• Spin-Liquid State in the S = 1/2 Hyperkagome Antiferromagnet Na4Ir3O8
• Quantum spin Hall effect in a transition metal oxide Na2IrO3
• Crystal field splitting and correlation effect on the electronic structure of A2IrO3
• Na2IrO3 as a spin-orbit-assisted antiferromagnetic insulator with a 340 meV gap
• Gapless spin liquids on the three dimensional hyper-kagome lattice of Na${}_4$Ir${}_3$O${}_8$
• Magnetism in Re-based ferrimagnetic double perovskites
• Mean field theory for double-perovskites

Cited by in corpus (12)

• Determination of Hund's coupling in 5d Oxides using Resonant Inelastic X-ray Scattering
• Double perovskite heterostructures: Magnetism, Chern bands, and Chern insulators
• Structural and magnetic properties of the 5$d^2$ double perovskites Sr${}_{2}B$ReO${}_6$ ($B$ $=$ Y, In)
• High-temperature large-gap quantum anomalous Hall insulator in ultrathin double perovskite films
• Theory of metallic double perovskites with spin orbit coupling and strong correlations; application to ferrimagnetic Ba2FeReO6
• Emergent dome of nematic order around a quantum anomalous Hall critical point
• Magnetic excitations in double perovskite iridates La${}_2$$M$IrO${}_6$ ($M$ = Co, Ni, and Zn) mediated by 3$d$-5$d$ hybridization
• Controlled confinement of half-metallic two-dimensional electron gas in BaTiO3/Ba2FeReO6/BaTiO3 heterostructures: A first-principles study
• Individual band with higher Chern numbers in double perovskite {001} monolayers
• Neutron Scattering Investigation of Rhenium Orbital Ordering in $3d-5d$ Double Perovskite Ca${}_2$FeReO${}_6$
• Electronic structure of Fe and magnetism in the $3d/5d$ double perovskites Ca${}_2$FeReO${}_6$ and Ba${}_2$FeReO${}_6$
• Resonant inelastic X-ray scattering investigation of Hund's and spin-orbit coupling in $5d^2$ double perovskites