Magnetic excitations in the double-perovskite iridates La2MIrO6 (M=Co,Ni,andZn) mediated by 3d–5d hybridization

Jin, Wentao; Chun, Sae Hwan; Kim, Jungho; Casa, Diego; Ruff, Jacob P. C.; Won, C. J.; Lee, K. D.; Hur, N.; Kim, Young-June

doi:10.1103/physrevb.105.054419

Title: Magnetic excitations in the double-perovskite iridates La 2 M IrO 6 ( M = Co , Ni , and Zn ) mediated by 3 d – 5 d hybridization

Journal Article · 18 February 2022 · Physical Review. B

DOI: https://doi.org/10.1103/physrevb.105.054419 · OSTI ID:1868977

^[1]; Chun, Sae Hwan ^[2];

^[3]; Casa, Diego ^[3]; Ruff, Jacob P. C. ^[4];

^[5]; Lee, K. D. ^[6]; Hur, N. ^[6]; Kim, Young-June ^[7]

Univ. of Toronto, ON (Canada); Beihang Univ., Beijing (China)
Univ. of Toronto, ON (Canada); Pohang Accelerator Lab., Gyeongbuk (Korea, Republic of)
Argonne National Lab. (ANL), Argonne, IL (United States)
Cornell Univ., Ithaca, NY (United States)
Inha Univ., Incheon (Korea, Republic of); Pohang Univ. of Science and Technology (Korea, Republic of)
Inha Univ., Incheon (Korea, Republic of)
Univ. of Toronto, ON (Canada)

By performing resonant inelastic x-ray scattering (RIXS) measurements at the Ir L₃ edge, we have investigated the low-energy elementary excitations in a series of double-perovskite iridate single crystals, La₂MIrO₆ (M=Co,Ni,and Zn). Almost dispersionless magnetic excitations at ~42(6) meV and ~35(5) meV have been observed in crystals containing magnetic 3d ions, La₂CoIrO₆ and La₂NiIrO₆, respectively. In contrast, this low-energy magnetic excitation is absent in La₂ZnIrO₆ in which the 3d ions are nonmagnetic, suggesting the importance of 3d–5d hybridization in the magnetic properties of these double-perovskite iridates. Furthermore, 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.

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Research Organization:: Argonne National Laboratory (ANL), Argonne, IL (United States)

Sponsoring Organization:: National Natural Science Foundation of China; National Research Foundation of Korea; USDOE Office of Science (SC)

Grant/Contract Number:: AC02-06CH11357

OSTI ID:: 1868977

Journal Information:: Physical Review. B, Journal Name: Physical Review. B Journal Issue: 5 Vol. 105; ISSN 2469-9950

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

References (53)

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Title: Magnetic excitations in the double-perovskite iridates La 2 M IrO 6 ( M = Co , Ni , and Zn ) mediated by 3 d – 5 d hybridization

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