Spin-orbit-lattice entangled state in A${}_2$MgReO${}_6$ (A = Ca, Sr, Ba) revealed by resonant inelastic X-ray scattering

Abstract

The $5d^1$ ordered double perovskites present an exotic playground for studying novel multi-polar physics due to large spin-orbit coupling. We present Re L3 edge resonant inelastic X-ray scattering (RIXS) results that reveal the presence of the dynamic Jahn-Teller effect in the A${}_2$MgReO${}_6$ (A = Ca, Sr, Ba) family of $5d^1$ double perovskites. The spin-orbit excitations in these materials show a strongly asymmetric lineshape and exhibit substantial temperature dependence, indicating that they are dressed with lattice vibrations. Our experimental results are explained quantitatively through a RIXS calculation based on a spin-orbit-lattice entangled electronic ground state with the dynamic Jahn-Teller effect taken into consideration. We find that the spin-orbit-lattice entangled state is robust against magnetic and structural phase transitions as well as against significant static Jahn-Teller distortions. Our results illustrate the importance of including vibronic coupling for a complete description of the ground state physics of $5d^1$ double perovskites. Usage: Secondary publications and information retrieval purposes.

References in corpus (13)

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• Novel Magnetism and Local Symmetry Breaking in a Mott Insulator with Strong Spin Orbit Interactions
• Detection of multipolar orders in the spin-orbit-entangled 5d Mott insulator Ba2MgReO6
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• 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${}_6$
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• Vibronic excitations in resonant inelastic x-ray scattering spectra of K${}_2$RuCl${}_6$
• Structure, heat capacity and Raman spectra of mm-sized Ba${}_2$MgWO${}_6$ single crystals synthesized by BaCl${}_2$-MgCl${}_2$ flux method
• Vibronic effect on resonant inelastic x-ray scattering in cubic iridium hexahalides

Cited by in corpus (11)

• Dynamic Jahn-Teller effect in the strong spin-orbit coupling regime
• The origin of magnetism in a supposedly nonmagnetic osmium oxide
• Hidden orders in spin-orbit entangled correlated insulators
• Spin-orbit-entangled electronic structure of Ba${}_2$CaOsO${}_6$ studied by O $K$-edge resonant inelastic X-ray scattering
• Dynamic Jahn-Teller Phenomena in Heavy Transition Metal Compounds
• Spin-orbital-lattice entanglement in the ideal j=1/2 compound K${}_2$IrCl${}_6$
• Resonant inelastic X-ray scattering investigation of Hund's and spin-orbit coupling in $5d^2$ double perovskites
• Persistent quantum vibronic dynamics in a $5d^1$ double perovskite oxide
• Chemical Pressure Tuning of Multipolar and Magnetic Orders in Ba${}_2$(Cd${}_{1-x}$Ca${}_x$)ReO${}_6$ Double Perovskites
• Coupled-cluster approach to vibronic effects in resonant inelastic x-ray scattering of quantum materials: Application to a $5d^1$ rhenium oxide
• Dipolar and quadrupolar correlations in the $5d^2$ Re-based double perovskites Ba${}_2$YReO${}_6$ and Ba${}_2$ScReO${}_6$