Successive Symmetry Breaking in a Jeff = 3/2 Quartet in the Spin-Orbit Coupled Insulator Ba2MgReO6

Abstract

We report on the cubic double perovskite Ba2MgReO6 containing Re6+ ions with the 5d1 electron configuration. Resistivity, magnetization, and heat capacity measurements using single crystals show that the compound is a Mott insulator with a magnetic transition at Tm = 18 K, which is accompanied by a weak ferromagnetic moment with [110] anisotropy. Another transition is observed at Tq = 33 K in heat capacity, where the inverse of magnetic susceptibility changes its slope, indicating a substantial change in the electronic state. The significance of spin-orbit coupling is revealed by the reduced effective magnetic moment of ~0.68μB at high temperature above Tq and the total electronic entropy close to Rln4. These features indicate that Ba2MgReO6 is a spin-orbit coupled Mott insulator possessing a Jeff = 3/2 quartet state, which exhibits quadrupolar and dipolar orders at Tq and Tm, respectively.

10 pages, 7 figures

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Cited by in corpus (41)

• Spin-orbit-entangled electronic phases in 4$d$ and 5$d$ transition-metal compounds
• Detection of multipolar orders in the spin-orbit-entangled 5d Mott insulator Ba2MgReO6
• Unified description of electronic orderings and cross correlations by complete multipole representation
• Exchange interactions, Jahn-Teller coupling, and multipole orders in pseudospin one-half $5{\mathbf{d}}^2$ Mott insulators
• Dynamic Jahn-Teller effect in the strong spin-orbit coupling regime
• Untangling the structural, magnetic dipole, and charge multipolar orders in Ba${}_2$MgReO${}_6$
• Phase transition preceding magnetic long-range order in the double perovskite Ba2NaOsO6
• Spin-orbit-lattice entangled state in A${}_2$MgReO${}_6$ (A = Ca, Sr, Ba) revealed by resonant inelastic X-ray scattering
• Probing octupolar hidden order via Janus impurities
• Phase transition in the 5d1 double perovskite Ba2CaReO6 induced by high magnetic field
• Octupolar order and Ising quantum criticality tuned by strain and dimensionality: Application to $d$-orbital Mott insulators
• Antiferromagnetic long-range order in $5d^1$ double-perovskite Sr${}_2$MgReO${}_6$
• Vibronic order and emergent magnetism in cubic $d^1$ double perovskites
• Possible quadrupole order in tetragonal Ba2CdReO6 and chemical trend in the ground states of 5d1 double perovskites
• Hidden orders in spin-orbit entangled correlated insulators
• Extremely large magnetoresistance in the hourglass Dirac loop chain metal β-ReO${}_2$
• Magnetic order and 5d1 multipoles in a rhenate double perovskite Ba2MgReO6
• Signatures of hidden octupolar order from nonlinear Hall effects
• Interplay between quadrupolar and magnetic interactions in 5$d^1$ double perovskite Ba${}_2$MgReO${}_6$ under pressure
• Valence bond glass state in the 4$d^1$ fcc antiferromagnet Ba${}_2$LuMoO${}_6$
• Anisotropic Triangular Lattice Realized in Rhenium Oxychlorides A3ReO5Cl2 (A = Ba and Sr)
• Multipolar magnetism in $5d^2$ vacancy-ordered halide double perovskites
• Structure, heat capacity and Raman spectra of mm-sized Ba${}_2$MgWO${}_6$ single crystals synthesized by BaCl${}_2$-MgCl${}_2$ flux method
• Phonon-driven multipolar dynamics in a spin-orbit coupled Mott insulator
• Experimental and theoretical thermodynamic studies in Ba${}_2$MgReO${}_6$ -- the ground state in the context of Jahn-Teller effect
• Pinalites: Optical properties and Quantum Magnetism of Heteroanionic A${}_3$MO${}_5$X${}_2$ Compounds
• Dynamic Jahn-Teller Phenomena in Heavy Transition Metal Compounds
• Fate of multipolar physics in $5d^2$ double perovskites
• Canted antiferromagnetism in a spin-orbit coupled $S_{\text{eff}}=3/2$ triangular-lattice magnet DyAuGe
• Electronic origin of ferroic quadrupole moment under antiferroic quadrupole orders and finite magnetic moment in $J_{\mathrm{eff}}=3/2$ systems
• Fermi surface and light quasi particles in hourglass nodal chain metal \b{eta}-ReO2
• Impact of gapped spin-orbit excitons on low energy pseudospin exchange interactions
• Chemical Pressure Tuning of Multipolar and Magnetic Orders in Ba${}_2$(Cd${}_{1-x}$Ca${}_x$)ReO${}_6$ Double Perovskites
• Odd-parity multipole order in the spin-orbit coupled metallic pyrochlore Pb${}_2$Re${}_2$O${}_{7-\delta }$
• Magnetic behavior of the $5d^1$ Re-based double perovskite Sr${}_2$ZnReO${}_6$
• Dipolar and quadrupolar correlations in the $5d^2$ Re-based double perovskites Ba${}_2$YReO${}_6$ and Ba${}_2$ScReO${}_6$
• Coupled-cluster approach to vibronic effects in resonant inelastic x-ray scattering of quantum materials: Application to a $5d^1$ rhenium oxide
• Magnetic ordering in the $J_{\mathrm{eff}}$ = 0 Nickelate NiRh${}_2$O${}_4$ prepared via a solid-state metathesis
• Intersite Coulomb repulsion driven quadrupole instability and magnetic ordering in the orbital frustrated Ba${}_2$MgReO${}_6$
• Novel Magnetoacoustic Resonance Technique for Exploring Hidden Quadrupoles in a Crystal Field Quartet
• Electronic and magnetic ground state of 4$d^3$ double perovskite ruthenates A${}_2$LaRuO${}_6$ (A $=$ Ca, Sr, Ba)