All-in all-out magnetic order and propagating spin-waves in Sm2Ir2O7

Abstract

Using resonant magnetic x-ray scattering we address the unresolved nature of the magnetic groundstate and the low-energy effective Hamiltonian of Sm${}_2$Ir${}_2$O${}_7$, a prototypical pyrochlore iridate with a finite temperature metal-insulator transition. Through a combination of elastic and inelastic measurements, we show that the magnetic ground state is an all-in all-out (AIAO) antiferromagnet. The magnon dispersion indicates significant electronic correlations and can be well-described by a minimal Hamiltonian that includes Heisenberg exchange ($J=27.3(6)$ meV) and Dzyaloshinskii-Moriya interaction ($D=4.9(3)$ meV), which provides a consistent description of the magnetic order and excitations. In establishing that Sm${}_2$Ir${}_2$O${}_7$ has the requisite inversion symmetry preserving AIAO magnetic groundstate, our results support the notion that pyrochlore iridates may host correlated Weyl semimetals.

8 pages, 7 figures

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Cited by in corpus (48)

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• Direct determination of the spin structure of Nd${}_2$Ir${}_2$O${}_7$ by means of neutron diffraction
• Weyl magnons in pyrochlore antiferromagnets with all-in-all-out orders
• Weyl magnons in noncoplanar stacked kagome antiferromagnets
• A magnetic Weyl semimetallic phase in thin films of Eu${}_2$Ir${}_2$O${}_7$
• Topological magnons with nodal-line and triple-point degeneracies: Implications for thermal Hall effect in pyrochlore iridates
• Spin Seebeck and Spin Nernst Effects of Magnons in Noncollinear Antiferromagnetic Insulators
• Dilute stuffing in the pyrochlore iridate $E{u}_{2}I{r}_2{O}_7$
• Robust pinning of magnetic moments in pyrochlore iridates
• Monopole density and antiferromagnetic domain control in spin-ice iridates
• Spontaneous Hall Effect enhanced by local Ir moments in epitaxial Pr${}_2$Ir${}_2$O${}_7$ thin films
• Anomalous lattice contraction and emergent electronic phases in Bi-doped Eu${}_2$Ir${}_2$O${}_7$
• Heavy-mass magnetic modes in pyrochlore iridates due to dominant Dzyaloshinskii-Moriya interaction
• Almost pure $J_{\mathrm{eff}}=1/2$ Mott state of In${}_2$Ir${}_2$O${}_7$ in the limit of reduced inter-site hopping
• Direct detection of dimer orbitals in Ba${}_5$AlIr${}_2$O${}_{11}$
• Unconventional free charge in the correlated semimetal Nd2Ir2O7
• Evolution of Magnetic Excitations Across the Metal-Insulator Transition in a Pyrochlore Iridate Eu${}_2$Ir${}_2$O${}_7$
• Nonreciprocal Transport in Noncoplanar Magnetic Systems without Spin-Orbit Coupling, Net Scalar Chirality, or Magnetization
• Identifying, and constructing, complex magnon band topology
• Interfacial Spin Seebeck effect in noncollinear magnetic systems
• Possibility to realize spin-orbit-induced correlated physics in iridium fluorides
• Approaching the quantum critical point in a highly-correlated all-in-all-out antiferromagnet
• Strong quantum fluctuations due to competition between magnetic phases in a pyrochlore iridate
• Strongly-coupled quantum critical point in an all-in-all-out antiferromagnet
• Inverted hysteresis and negative remanence in a homogeneous antiferromagnet
• Field-induced spin reorientation in the antiferromagnetic Dirac material EuMnBi${}_2$ revealed by neutron and resonant x-ray diffraction
• Longitudinal Spin Seebeck effect in Pyrochlore Iridates with Bulk and Interfacial Dzyaloshinskii-Moriya interaction
• Monopole-limited nucleation of magnetism in Eu${}_2$Ir${}_2$O${}_7$
• Magnetotransport of single crystal Sm${}_2$Ir${}_2$O${}_7$ across the pressure-induced quantum-critical phase boundary
• Strong anisotropy within a Heisenberg model in the J=1/2 insulating state of Sr2Ir0.8Ru0.2O4
• Magnetically induced metal-insulator transition in Pb2CaOsO6
• Microscopic theory of Dzyaloshinsky-Moriya interaction in pyrochlore oxides with spin-orbit coupling
• Spin and orbital dynamics through the metal-to-insulator transition in Cd${}_2$Os${}_2$O${}_7$ probed with high-resolution RIXS
• Selective probing of magnetic order on Tb and Ir sites in stuffed Tb${}_{2+x}$Ir${}_{2-x}$O${}_{7-y}$ using resonant X-ray scattering
• Magnon Dispersion and Specific Heat of Chiral Magnets on the Pyrochlore Lattice
• Pyrochlore Oxide Hg2Os2O7 on Verge of Metal-Insulator Boundary
• Traversing the pyrochlore stability diagram; microwave-assisted synthesis and discovery of mixed B-site Ln${}_2$InSbO${}_7$ family
• Effects of magnon-magnon interactions in a noncollinear magnet induced by combination of a symmetric and an antisymmetric exchange interaction
• Electron quasi-itinerancy intertwined with quantum order by disorder in pyrochlore iridate magnetism
• Metal-insulator transitions in pyrochlore oxides
• Multi-$Q$ magnetic phases from frustration and chiral interactions
• Spontaneous Hall effect induced by strain in Pr${}_2$Ir${}_2$O${}_7$ epitaxial thin films
• Ab initio determination of magnetic ground state of pyrochlore Y${}_2$Mn${}_2$O${}_7$
• Tunneling between chiral magnets: Spin current generation without external fields
• Route to in situ synthesis of epitaxial Pr2Ir2O7 thin films guided by thermodynamic calculations