Dipolar and quadrupolar correlations in the $5d^2$ Re-based double perovskites Ba${}_2$YReO${}_6$ and Ba${}_2$ScReO${}_6$

Abstract

Double perovskites containing heavy transition metal ions are an important family of compounds for the study of the interplay between electron correlation and spin-orbit coupling. Here, by combining magnetic susceptibility, heat capacity, and neutron scattering measurements, we investigate the dipolar and quadrupolar correlations in two prototype rhenium-based double perovskite compounds, Ba${}_2$YReO${}_6$ and Ba${}_2$ScReO${}_6$. A type-I dipolar antiferromagnetic ground state with a propagation vector $\mathbf{q}=(0,0,1)$ is observed in both compounds. At temperatures above the magnetic transitions, a quadrupolar ordered phase is identified. Weak spin excitations, which are gapped at low temperatures and softened in the correlated paramagnetic phase, are explained using a minimal model that considers both the dipolar and quadrupolar interactions. At larger wavevectors, we observe dominant phonon excitations that are well described by density functional calculations.

13 pages, 10 figures

References in corpus (47)

• Mantid - Data Analysis and Visualization Package for Neutron Scattering and $\mu SR$ Experiments
• Novel Jeff = 1/2 Mott State Induced by Relativistic Spin-Orbit Coupling in Sr2IrO4
• Correlated quantum phenomena in the strong spin-orbit regime
• Kitaev quantum spin liquid - concept and materialization
• Neutron tomography of magnetic Majorana fermions in a proximate quantum spin liquid
• Phonon-phonon interactions in transition metals
• Exotic phases induced by strong spin-orbit coupling in ordered double perovskites
• Ferromagnetism in the Mott insulator Ba2NaOsO6
• Orbital physics in transition metal compounds: new trends
• Spin-orbit coupling in $d^2$ ordered double perovskites
• Spin-orbit-entangled electronic phases in 4$d$ and 5$d$ transition-metal compounds
• Orbital ordering phenomena in $d$- and $f$-electron systems
• The frustrated FCC antiferromagnet Ba2YOsO6: structural characterization, magnetic properties and neutron scattering studies
• Detection of multipolar orders in the spin-orbit-entangled 5d Mott insulator Ba2MgReO6
• Octupolar vs Néel Order in Cubic 5$d^2$ double perovskites
• Determination of Hund's coupling in 5d Oxides using Resonant Inelastic X-ray Scattering
• Octupolar order in d-orbital Mott insulators
• Successive Symmetry Breaking in a Jeff = 3/2 Quartet in the Spin-Orbit Coupled Insulator Ba2MgReO6
• Long-Range Magnetic Order in the 5d^2 Double Perovskite Ba2CaOsO6: Comparison with Spin-Disordered Ba2YReO6
• Multipolar, magnetic and vibrational lattice dynamics in the low temperature phase of uranium dioxide
• Spin-orbit coupling controlled $J=3/2$ electronic ground state in 5$d^3$ oxides
• Multipolar magnetism in d-orbital systems: Crystal field levels, octupolar order, and orbital loop currents
• Spin-orbit coupling controlled ground state in Sr${}_2$ScOsO${}_6$
• Spin-orbital-lattice entangled states in cubic $d^1$ double perovskites
• Exchange interactions, Jahn-Teller coupling, and multipole orders in pseudospin one-half $5{\mathbf{d}}^2$ Mott insulators
• Ferro-octupolar order and low-energy excitations in d${}^2$ double perovskites of Osmium
• Dynamic Jahn-Teller effect in the strong spin-orbit coupling regime
• Spin-orbit coupled systems in the "atomic" limit: rhenates, osmates, iridates
• Orbital and spin order in spin-orbit coupled $d^1$ and $d^2$ double perovskites
• Spin-orbit coupling control of anisotropy, ground state and frustration in 5d2 Sr2MgOsO6
• Multiflavor Mott insulators in quantum materials and ultracold atoms
• Spin-orbit-lattice entangled state in A${}_2$MgReO${}_6$ (A = Ca, Sr, Ba) revealed by resonant inelastic X-ray scattering
• Hidden order and multipolar exchange striction in a correlated f-electron system
• Phase transition in the 5d1 double perovskite Ba2CaReO6 induced by high magnetic field
• Antiferromagnetic long-range order in $5d^1$ double-perovskite Sr${}_2$MgReO${}_6$
• Possible quadrupole order in tetragonal Ba2CdReO6 and chemical trend in the ground states of 5d1 double perovskites
• Vibronic order and emergent magnetism in cubic $d^1$ double perovskites
• Lone octupole and bulk magnetism in osmate 5d2 double perovskites
• Interplay of superexchange and vibronic effects in the hidden order of Ba${}_2$MgReO${}_6$ from first principles
• Interplay between quadrupolar and magnetic interactions in 5$d^1$ double perovskite Ba${}_2$MgReO${}_6$ under pressure
• Spin gaps in the ordered states of La${}_2$LiXO${}_6$ (X = Ru, Os) and their relation to distortion of the cubic double perovskite structure in 4$d^3$ and 5$d^3$ magnets
• Multipolar magnetism in $5d^2$ vacancy-ordered halide double perovskites
• Multipolar interactions and magnetic excitation gap in d${}^3$ spin-orbit Mott insulators
• Diffraction by multipoles in a 5d2 rhenium double perovskite
• Fate of multipolar physics in $5d^2$ double perovskites
• Multipolar multiferroics in $4d^2$/$5d^2$ Mott insulators
• Emergence of quadrupolar order under magnetic field in $5d^2$ double perovskites

Cited by in corpus (1)

• Resonant inelastic X-ray scattering investigation of Hund's and spin-orbit coupling in $5d^2$ double perovskites