Magnetic excitations in the double-perovskite iridates La2MIrO6 (M=Co,Ni,andZn) mediated by 3d−5d hybridization
Source abstract
Abstract
By performing resonant inelastic x-ray scattering (RIXS) measurements at the Ir ${\mathit{L}}3$ edge, we have investigated the low-energy elementary excitations in a series of double-perovskite iridate single crystals, ${\mathrm{La}}2\mathit{M}{\mathrm{IrO}}6 (\mathit{M}=\mathrm{Co},\mathrm{Ni},\phantom{\rule{0.28em}{0ex}}\text{and}\phantom{\rule{0.28em}{0ex}}\mathrm{Zn})$. Almost dispersionless magnetic excitations at $\ensuremath{\sim}42(6)$ meV and $\ensuremath{\sim}35$(5) meV have been observed in crystals containing magnetic $3\mathit{d}$ ions, ${\mathrm{La}}2{\mathrm{CoIrO}}6$ and ${\mathrm{La}}2{\mathrm{NiIrO}}6$, respectively. In contrast, this low-energy magnetic excitation is absent in ${\mathrm{La}}2{\mathrm{ZnIrO}}6$ in which the $3\mathit{d}$ ions are nonmagnetic, suggesting the importance of $3\mathit{d}\ensuremath{-}5\mathit{d}$ hybridization in the magnetic properties of these double-perovskite iridates. The magnetic excitation is suppressed completely above the magnetic ordering temperature, suggesting the inadequacy of using a simple spin Hamiltonian to describe magnetism of these materials.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Advanced Condensed Matter Physics · Magnetic and transport properties of perovskites and related materials · Electronic and Structural Properties of Oxides
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Department of Physics, University of Toronto, Toronto, Ontario, M5S 1A7, Canada
School of Physics, Beihang University, Beijing 100191, China
Pohang Accelerator Laboratory, Pohang, Gyeongbuk 37673, Republic of Korea
Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439, USA
Cornell High Energy Synchrotron Source, Cornell University, Ithaca, New York 14853, USA
Department of Physics, Inha University, Incheon 22212, Republic of Korea
Laboratory for Pohang Emergent Materials and Max Plank POSTECH Center for Complex Phase Materials, Pohang University of Science and Technology, Pohang 37673, Republic of Korea
Funding
Natural Sciences and Engineering Research Council of Canada · National Natural Science Foundation of China · National Research Foundation of Korea · U.S. Department of Energy
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