Excitonic dispersion of the intermediate spin state in LaCoO3 revealed by resonant inelastic x-ray scattering

Ru-pan Wang; Atsushi Hariki; Andrii Sotnikov; Federica Frati; Jun Okamoto; Hsiao-yu Huang; Amol Singh; Di-jing Huang; Keisuke Tomiyasu; Chao-hung Du; Jan Kuneš; Frank M. F. De Groot

doi:10.1103/PhysRevB.98.035149

Excitonic dispersion of the intermediate spin state in LaCoO3 revealed by resonant inelastic x-ray scattering

Ru-pan Wang, Atsushi Hariki, Andrii Sotnikov, Federica Frati, Jun Okamoto, Hsiao-yu Huang, Amol Singh, Di-jing Huang, Keisuke Tomiyasu, Chao-hung Du, Jan Kuneš, Frank M. F. De Groot

Sub Inorganic Chemistry and Catalysis

Research output: Contribution to journal › Article › Academic › peer-review

Abstract

We report Co L3-edge resonant inelastic x-ray scattering on
LaCoO3 at 20 K. We observe excitations with sizable dispersion that we identify as intermediate-spin (IS) states. Theoretical calculations that treat the IS states as mobile excitons propagating on the low-spin background support the interpretation. The present result shows that mobility substantially reduces the energy of IS excitations in part of the Brillouin zone, which makes them important players in the low-energy physics of LaCoO3 together with immobile high-spin excitations.

Original language	English
Article number	035149
Journal	Physical Review B
Volume	98
Issue number	3
DOIs	https://doi.org/10.1103/PhysRevB.98.035149
Publication status	Published - 2018

Keywords

Composite bosons
Excitons
Strongly correlated systems

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title = "Excitonic dispersion of the intermediate spin state in LaCoO3 revealed by resonant inelastic x-ray scattering",

abstract = "We report Co L3-edge resonant inelastic x-ray scattering on LaCoO3 at 20 K. We observe excitations with sizable dispersion that we identify as intermediate-spin (IS) states. Theoretical calculations that treat the IS states as mobile excitons propagating on the low-spin background support the interpretation. The present result shows that mobility substantially reduces the energy of IS excitations in part of the Brillouin zone, which makes them important players in the low-energy physics of LaCoO3 together with immobile high-spin excitations.",

keywords = "Composite bosons, Excitons, Strongly correlated systems",

author = "Ru-pan Wang and Atsushi Hariki and Andrii Sotnikov and Federica Frati and Jun Okamoto and Hsiao-yu Huang and Amol Singh and Di-jing Huang and Keisuke Tomiyasu and Chao-hung Du and Jan Kune{\v s} and {De Groot}, {Frank M. F.}",

year = "2018",

doi = "10.1103/PhysRevB.98.035149",

language = "English",

volume = "98",

journal = "Physical Review B",

issn = "2469-9950",

publisher = "American Institute of Physics",

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TY - JOUR

T1 - Excitonic dispersion of the intermediate spin state in LaCoO3 revealed by resonant inelastic x-ray scattering

AU - Wang, Ru-pan

AU - Hariki, Atsushi

AU - Sotnikov, Andrii

AU - Frati, Federica

AU - Okamoto, Jun

AU - Huang, Hsiao-yu

AU - Singh, Amol

AU - Huang, Di-jing

AU - Tomiyasu, Keisuke

AU - Du, Chao-hung

AU - Kuneš, Jan

AU - De Groot, Frank M. F.

PY - 2018

Y1 - 2018

N2 - We report Co L3-edge resonant inelastic x-ray scattering on LaCoO3 at 20 K. We observe excitations with sizable dispersion that we identify as intermediate-spin (IS) states. Theoretical calculations that treat the IS states as mobile excitons propagating on the low-spin background support the interpretation. The present result shows that mobility substantially reduces the energy of IS excitations in part of the Brillouin zone, which makes them important players in the low-energy physics of LaCoO3 together with immobile high-spin excitations.

AB - We report Co L3-edge resonant inelastic x-ray scattering on LaCoO3 at 20 K. We observe excitations with sizable dispersion that we identify as intermediate-spin (IS) states. Theoretical calculations that treat the IS states as mobile excitons propagating on the low-spin background support the interpretation. The present result shows that mobility substantially reduces the energy of IS excitations in part of the Brillouin zone, which makes them important players in the low-energy physics of LaCoO3 together with immobile high-spin excitations.

KW - Composite bosons

KW - Excitons

KW - Strongly correlated systems

U2 - 10.1103/PhysRevB.98.035149

DO - 10.1103/PhysRevB.98.035149

M3 - Article

SN - 2469-9950

VL - 98

JO - Physical Review B

JF - Physical Review B

IS - 3

M1 - 035149

ER -

Excitonic dispersion of the intermediate spin state in LaCoO3 revealed by resonant inelastic x-ray scattering

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Keywords

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