Giant spin-phonon-electronic coupling in a 5d oxide

Abstract

Enhanced coupling of material properties offers new fundamental insights and routes to multifunctional devices. In this context 5d oxides provide new paradigms of cooperative interactions driving novel emergent behavior. This is exemplified in 5d osmates that host a metal-insulator transition (MIT) driven by magnetic order. Here we consider the most robust case, the 5d perovskite NaOsO3, and reveal a giant coupling between spin and phonon through a frequency shift of Δω=40 cm-1, the largest measured in any material. We identify the dominant octahedral breathing mode and show isosymmetry with spin ordering which induces dynamic charge disproportionation that sheds new light on the MIT. The occurrence of the dramatic spin-phonon-electronic coupling in NaOsO3 is due to a property common to all 5d materials: the large spatial extent of the 5d ion. This allows magnetism to couple to phonons on an unprecedented scale and consequently offers multiple new routes to enhanced coupled phenomena.

References in corpus (5)

• Ultrafast transient generation of spin-densitywave order in the normal state of BaFe2As2 driven by coherent lattice vibrations
• Magnetically driven metal-insulator transition in NaOsO3
• Tetrahedral Magnetic Order and the Metal-Insulator Transition in the Pyrochlore Lattice of Cd2Os2O7
• Dimensionality Driven Spin-Flop Transition in Layered Iridates
• Robustness of basal-plane antiferromagnetic order and the $J_{eff}=1/2$ state in single-layer iridate spin-orbit Mott insulators

Cited by in corpus (23)

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• Coulomb Correlations in 4d and 5d Oxides from First Principles - or How Spin-Orbit Materials choose their Effective Orbital Degeneracies
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• Slater Insulator in Iridate Perovskites with Strong Spin-Orbit Coupling
• Lifshitz transition driven by spin fluctuations and spin-orbit renormalization in NaOsO${}_3$
• Electromagnon dispersion probed by inelastic x-ray scattering
• Signatures of magnetostriction and spin-phonon coupling in magnetoelectric hexagonal 15R-BaMnO3
• Strongly Gapped Spin-Wave Excitation in the Insulating Phase of NaOsO3
• Evolution of the magnetic excitations in NaOsO${}_3$ through its metal-insulator transition
• Comparative ab initio study of the structural, electronic, magnetic, and dynamical properties of LiOsO${}_3$ and NaOsO${}_3$
• Magnetodielectric coupling in a Ru-based 6H-perovskite, Ba3NdRu2O9
• Role of Square Planar Coordination in the Magnetic Properties of Na4IrO4
• Crossover from itinerant to localized magnetic excitations through the metal-insulator transition in NaOsO${}_{\text{3}}$
• Spin-phonon coupling in Sr and Ti incorporated 9R-BaMnO3
• Spin-phonon interactions and magnetoelectric coupling in Co${}_4$$B_2$O${}_9$ ($B$ = Nb, Ta)
• Isospin-phonon coupling and Fano-interference in spin-orbit Mott insulator Sr2IrO4
• Correlated Paramagnetism and Interplay of Magnetic and Phononic Degrees of Freedom in 3d-5d Coupled La2CuIrO6
• Doping-induced insulator-metal transition in the Lifshitz magnetic insulator NaOsO3
• Momentum-resolved lattice dynamics of parent and electron-doped Sr${}_2$IrO${}_4$
• Spin and orbital dynamics through the metal-to-insulator transition in Cd${}_2$Os${}_2$O${}_7$ probed with high-resolution RIXS
• Modeling non-harmonic behavior of materials from experimental inelastic neutron scattering and thermal expansion measurements
• Study of polycrystalline bulk Sr${}_3$OsO${}_6$ double-perovskite insulator: comparison with 1000 K ferromagnetic epitaxial films
• Melting of magnetic order in ${\mathrm{NaOsO}}_3$ by fs laser pulses