Low-energy electronic interactions in ferrimagnetic Sr2CrRe O6 thin films

Guillaume Marcaud; Alex Taekyung Lee; Adam J. Hauser; F. Y. Yang; Sangjae Lee; Diego Casa; Mary Upton; Thomas Gog; Kayahan Saritas; Yilin Wang; Mark P.M. Dean; Hua Zhou; Zhan Zhang; F. J. Walker; Ignace Jarrige; Sohrab Ismail-Beigi; Charles Ahn

doi:10.1103/PhysRevB.108.075132

Low-energy electronic interactions in ferrimagnetic Sr2CrRe O6 thin films

Guillaume Marcaud, Alex Taekyung Lee, Adam J. Hauser, F. Y. Yang, Sangjae Lee, Diego Casa, Mary Upton, Thomas Gog, Kayahan Saritas, Yilin Wang, Mark P.M. Dean, Hua Zhou, Zhan Zhang, F. J. Walker, Ignace Jarrige, Sohrab Ismail-Beigi, Charles Ahn

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1 Scopus citations

Abstract

We reveal in this study the fundamental low-energy landscape in the ferrimagnetic Sr2CrReO6 double perovskite and describe the underlying mechanisms responsible for the three low-energy excitations below 1.4 eV. Based on resonant inelastic x-ray scattering and magnetic dynamics calculations, and experiments collected from both Sr2CrReO6 powders and epitaxially strained thin films, we reveal a strong competition between spin-orbit coupling, Hund's coupling, and the strain-induced tetragonal crystal field. We also demonstrate that a spin-flip process is at the origin of the lowest excitation at 200 meV, and we bring insights into the predicted presence of orbital ordering in this material. We study the nature of the magnons through a combination of ab initio and spin-wave theory calculations, and show that two nondegenerate magnon bands exist and are dominated either by rhenium or chromium spins. The rhenium band is found to be flat at about 200 meV (±25 meV) through X-L-W-U high-symmetry points and is dispersive toward Γ.

Original language	English
Article number	075132
Journal	Physical Review B
Volume	108
Issue number	7
DOIs	https://doi.org/10.1103/PhysRevB.108.075132
State	Published - Aug 15 2023
Externally published	Yes

Funding

Work at Yale was supported by the Air Force Office of Scientific Research (AFOSR) under Grant No. FA9550-21-1-0173. Work at Brookhaven National Laboratory was supported by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences under Contract No. DE-SC0012704. This research used resources of the Advanced Photon Source, a U.S. Department of Energy (DOE) Office of Science user facility operated for the DOE Office of Science by Argonne National Laboratory under Contract No. DE-AC02-06CH11357. F.Y.Y. acknowledges the support by the Center for Emergent Materials, an NSF MRSEC, under Grant No. DMR-2011876.

Funders	Funder number
U.S. Department of Energy
Air Force Office of Scientific Research	FA9550-21-1-0173
Office of Science
Basic Energy Sciences	DE-SC0012704
Argonne National Laboratory	DE-AC02-06CH11357
Materials Research Science and Engineering Center, Harvard University	DMR-2011876

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10.1103/PhysRevB.108.075132

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Marcaud, G., Taekyung Lee, A., Hauser, A. J., Yang, F. Y., Lee, S., Casa, D., Upton, M., Gog, T., Saritas, K., Wang, Y., Dean, M. P. M., Zhou, H., Zhang, Z., Walker, F. J., Jarrige, I., Ismail-Beigi, S., & Ahn, C. (2023). Low-energy electronic interactions in ferrimagnetic Sr2CrRe O6 thin films. Physical Review B, 108(7), Article 075132. https://doi.org/10.1103/PhysRevB.108.075132

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title = "Low-energy electronic interactions in ferrimagnetic Sr2CrRe O6 thin films",

abstract = "We reveal in this study the fundamental low-energy landscape in the ferrimagnetic Sr2CrReO6 double perovskite and describe the underlying mechanisms responsible for the three low-energy excitations below 1.4 eV. Based on resonant inelastic x-ray scattering and magnetic dynamics calculations, and experiments collected from both Sr2CrReO6 powders and epitaxially strained thin films, we reveal a strong competition between spin-orbit coupling, Hund's coupling, and the strain-induced tetragonal crystal field. We also demonstrate that a spin-flip process is at the origin of the lowest excitation at 200 meV, and we bring insights into the predicted presence of orbital ordering in this material. We study the nature of the magnons through a combination of ab initio and spin-wave theory calculations, and show that two nondegenerate magnon bands exist and are dominated either by rhenium or chromium spins. The rhenium band is found to be flat at about 200 meV (±25 meV) through X-L-W-U high-symmetry points and is dispersive toward Γ.",

author = "Guillaume Marcaud and {Taekyung Lee}, Alex and Hauser, {Adam J.} and Yang, {F. Y.} and Sangjae Lee and Diego Casa and Mary Upton and Thomas Gog and Kayahan Saritas and Yilin Wang and Dean, {Mark P.M.} and Hua Zhou and Zhan Zhang and Walker, {F. J.} and Ignace Jarrige and Sohrab Ismail-Beigi and Charles Ahn",

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doi = "10.1103/PhysRevB.108.075132",

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AU - Marcaud, Guillaume

AU - Taekyung Lee, Alex

AU - Hauser, Adam J.

AU - Yang, F. Y.

AU - Lee, Sangjae

AU - Casa, Diego

AU - Upton, Mary

AU - Gog, Thomas

AU - Saritas, Kayahan

AU - Wang, Yilin

AU - Dean, Mark P.M.

AU - Zhou, Hua

AU - Zhang, Zhan

AU - Walker, F. J.

AU - Jarrige, Ignace

AU - Ismail-Beigi, Sohrab

AU - Ahn, Charles

PY - 2023/8/15

Y1 - 2023/8/15

N2 - We reveal in this study the fundamental low-energy landscape in the ferrimagnetic Sr2CrReO6 double perovskite and describe the underlying mechanisms responsible for the three low-energy excitations below 1.4 eV. Based on resonant inelastic x-ray scattering and magnetic dynamics calculations, and experiments collected from both Sr2CrReO6 powders and epitaxially strained thin films, we reveal a strong competition between spin-orbit coupling, Hund's coupling, and the strain-induced tetragonal crystal field. We also demonstrate that a spin-flip process is at the origin of the lowest excitation at 200 meV, and we bring insights into the predicted presence of orbital ordering in this material. We study the nature of the magnons through a combination of ab initio and spin-wave theory calculations, and show that two nondegenerate magnon bands exist and are dominated either by rhenium or chromium spins. The rhenium band is found to be flat at about 200 meV (±25 meV) through X-L-W-U high-symmetry points and is dispersive toward Γ.

AB - We reveal in this study the fundamental low-energy landscape in the ferrimagnetic Sr2CrReO6 double perovskite and describe the underlying mechanisms responsible for the three low-energy excitations below 1.4 eV. Based on resonant inelastic x-ray scattering and magnetic dynamics calculations, and experiments collected from both Sr2CrReO6 powders and epitaxially strained thin films, we reveal a strong competition between spin-orbit coupling, Hund's coupling, and the strain-induced tetragonal crystal field. We also demonstrate that a spin-flip process is at the origin of the lowest excitation at 200 meV, and we bring insights into the predicted presence of orbital ordering in this material. We study the nature of the magnons through a combination of ab initio and spin-wave theory calculations, and show that two nondegenerate magnon bands exist and are dominated either by rhenium or chromium spins. The rhenium band is found to be flat at about 200 meV (±25 meV) through X-L-W-U high-symmetry points and is dispersive toward Γ.

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Low-energy electronic interactions in ferrimagnetic Sr2CrRe O6 thin films

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