RIXS interferometry and the role of disorder in the quantum magnet Ba_{3}Ti_{3−x}Ir_{x}O_{9}
Motivated by several claims of spin-orbit-driven spin-liquid physics in hexagonal Ba_{3}Ti_{3−x}Ir_{x}O_{9} hosting Ir_{2}O_{9} dimers, we report on resonant inelastic x-ray scattering (RIXS) at the Ir L_{3} edge for different x. We demonstrate that magnetism in Ba_{3}Ti_{3−x}Ir_{x}O_{9} is governed...
| Main Authors: | , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
American Physical Society
2023-03-01
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| Series: | Physical Review Research |
| Online Access: | http://doi.org/10.1103/PhysRevResearch.5.013167 |
| _version_ | 1827285279217549312 |
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| author | M. Magnaterra M. Moretti Sala G. Monaco P. Becker M. Hermanns P. Warzanowski T. Lorenz D. I. Khomskii P. H. M. van Loosdrecht J. van den Brink M. Grüninger |
| author_facet | M. Magnaterra M. Moretti Sala G. Monaco P. Becker M. Hermanns P. Warzanowski T. Lorenz D. I. Khomskii P. H. M. van Loosdrecht J. van den Brink M. Grüninger |
| author_sort | M. Magnaterra |
| collection | DOAJ |
| description | Motivated by several claims of spin-orbit-driven spin-liquid physics in hexagonal Ba_{3}Ti_{3−x}Ir_{x}O_{9} hosting Ir_{2}O_{9} dimers, we report on resonant inelastic x-ray scattering (RIXS) at the Ir L_{3} edge for different x. We demonstrate that magnetism in Ba_{3}Ti_{3−x}Ir_{x}O_{9} is governed by an unconventional realization of strong disorder, where cation disorder affects the character of the local moments. RIXS interferometry, studying the RIXS intensity over a broad range of transferred momentum q, is ideally suited to assign different excitations to different Ir sites. We find pronounced Ir-Ti site mixing. Both ions are distributed over two crystallographically inequivalent sites, giving rise to a coexistence of quasimolecular singlet states on Ir_{2}O_{9} dimers and spin-orbit-entangled j=1/2 moments of 5d^{5}Ir^{4+} ions. RIXS reveals different kinds of strong magnetic couplings for different bonding geometries, highlighting the role of cation disorder for the suppression of long-range magnetic order in this family of compounds. |
| first_indexed | 2024-04-24T10:12:18Z |
| format | Article |
| id | doaj.art-e9f563cf98394a8ea61d6e5e4dc81a79 |
| institution | Directory Open Access Journal |
| issn | 2643-1564 |
| language | English |
| last_indexed | 2024-04-24T10:12:18Z |
| publishDate | 2023-03-01 |
| publisher | American Physical Society |
| record_format | Article |
| series | Physical Review Research |
| spelling | doaj.art-e9f563cf98394a8ea61d6e5e4dc81a792024-04-12T17:29:05ZengAmerican Physical SocietyPhysical Review Research2643-15642023-03-015101316710.1103/PhysRevResearch.5.013167RIXS interferometry and the role of disorder in the quantum magnet Ba_{3}Ti_{3−x}Ir_{x}O_{9}M. MagnaterraM. Moretti SalaG. MonacoP. BeckerM. HermannsP. WarzanowskiT. LorenzD. I. KhomskiiP. H. M. van LoosdrechtJ. van den BrinkM. GrüningerMotivated by several claims of spin-orbit-driven spin-liquid physics in hexagonal Ba_{3}Ti_{3−x}Ir_{x}O_{9} hosting Ir_{2}O_{9} dimers, we report on resonant inelastic x-ray scattering (RIXS) at the Ir L_{3} edge for different x. We demonstrate that magnetism in Ba_{3}Ti_{3−x}Ir_{x}O_{9} is governed by an unconventional realization of strong disorder, where cation disorder affects the character of the local moments. RIXS interferometry, studying the RIXS intensity over a broad range of transferred momentum q, is ideally suited to assign different excitations to different Ir sites. We find pronounced Ir-Ti site mixing. Both ions are distributed over two crystallographically inequivalent sites, giving rise to a coexistence of quasimolecular singlet states on Ir_{2}O_{9} dimers and spin-orbit-entangled j=1/2 moments of 5d^{5}Ir^{4+} ions. RIXS reveals different kinds of strong magnetic couplings for different bonding geometries, highlighting the role of cation disorder for the suppression of long-range magnetic order in this family of compounds.http://doi.org/10.1103/PhysRevResearch.5.013167 |
| spellingShingle | M. Magnaterra M. Moretti Sala G. Monaco P. Becker M. Hermanns P. Warzanowski T. Lorenz D. I. Khomskii P. H. M. van Loosdrecht J. van den Brink M. Grüninger RIXS interferometry and the role of disorder in the quantum magnet Ba_{3}Ti_{3−x}Ir_{x}O_{9} Physical Review Research |
| title | RIXS interferometry and the role of disorder in the quantum magnet Ba_{3}Ti_{3−x}Ir_{x}O_{9} |
| title_full | RIXS interferometry and the role of disorder in the quantum magnet Ba_{3}Ti_{3−x}Ir_{x}O_{9} |
| title_fullStr | RIXS interferometry and the role of disorder in the quantum magnet Ba_{3}Ti_{3−x}Ir_{x}O_{9} |
| title_full_unstemmed | RIXS interferometry and the role of disorder in the quantum magnet Ba_{3}Ti_{3−x}Ir_{x}O_{9} |
| title_short | RIXS interferometry and the role of disorder in the quantum magnet Ba_{3}Ti_{3−x}Ir_{x}O_{9} |
| title_sort | rixs interferometry and the role of disorder in the quantum magnet ba 3 ti 3 x ir x o 9 |
| url | http://doi.org/10.1103/PhysRevResearch.5.013167 |
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