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

Otkur Omar; Yang Zhang; Qiang Zhang; Wei Tian; Elbio Dagotto; Gang Chen; Taka-hisa Arima; Matthew B. Stone; Andrew D. Christianson; Daigorou Hirai; Shang Gao

doi:10.1103/gwph-w9zm

paper

Dipolar and quadrupolar correlations in the $5 d^{2}$ Re-based double perovskites Ba $_{2}$ YReO $_{6}$ and Ba $_{2}$ ScReO $_{6}$

arXiv:2502.02952 · doi:10.1103/gwph-w9zm

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 $q = (0, 0, 1)$ 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

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

Dipolar and quadrupolar correlations in the 5d2 Re-based double perovskites Ba2​YReO6​ and Ba2​ScReO6​

Abstract

References in corpus (47)

Cited by in corpus (1)

Dipolar and quadrupolar correlations in the $5 d^{2}$ Re-based double perovskites Ba $_{2}$ YReO $_{6}$ and Ba $_{2}$ ScReO $_{6}$