Spatial distribution of transferred charges across the heterointerface between perovskite transition metal oxides LaNiO3 and LaMnO3

Miho Kitamura; Koji Horiba; Masaki Kobayashi; Enju Sakai; Makoto Minohara; Taichi Mitsuhashi; Atsushi Fujimori; Takuro Nagai; Hiroshi Fujioka; Hiroshi Kumigashira

doi:10.1063/1.4944418

Spatial distribution of transferred charges across the heterointerface between perovskite transition metal oxides LaNiO₃ and LaMnO₃

Miho Kitamura, Koji Horiba, Masaki Kobayashi, Enju Sakai, Makoto Minohara, Taichi Mitsuhashi, Atsushi Fujimori, Takuro Nagai, Hiroshi Fujioka, Hiroshi Kumigashira

IMRAM - Division of Inorganic Material Research

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

12 Citations (Scopus)

Abstract

To investigate the interfacial charge-transfer phenomena between perovskite transition metal oxides LaNiO₃ (LNO) and LaMnO₃ (LMO), we have performed in situ x-ray absorption spectroscopy (XAS) measurements on LNO/LMO multilayers. The Ni-L_2,3 and Mn-L_2,3 XAS spectra clearly show the occurrence of electron transfer from Mn to Ni ions in the interface region. Detailed analysis of the thickness dependence of these XAS spectra has revealed that the spatial distribution of the transferred charges across the interface is significantly different between the two constituent layers. The observed spatial distribution is presumably described by the charge spreading model that treats the transfer integral between neighboring transition metal ions and the Coulomb interaction, rather than the Thomas-Fermi screening model.

Original language	English
Article number	111603
Journal	Applied Physics Letters
Volume	108
Issue number	11
DOIs	https://doi.org/10.1063/1.4944418
Publication status	Published - 2016 Mar 14

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title = "Spatial distribution of transferred charges across the heterointerface between perovskite transition metal oxides LaNiO3 and LaMnO3",

abstract = "To investigate the interfacial charge-transfer phenomena between perovskite transition metal oxides LaNiO3 (LNO) and LaMnO3 (LMO), we have performed in situ x-ray absorption spectroscopy (XAS) measurements on LNO/LMO multilayers. The Ni-L2,3 and Mn-L2,3 XAS spectra clearly show the occurrence of electron transfer from Mn to Ni ions in the interface region. Detailed analysis of the thickness dependence of these XAS spectra has revealed that the spatial distribution of the transferred charges across the interface is significantly different between the two constituent layers. The observed spatial distribution is presumably described by the charge spreading model that treats the transfer integral between neighboring transition metal ions and the Coulomb interaction, rather than the Thomas-Fermi screening model.",

author = "Miho Kitamura and Koji Horiba and Masaki Kobayashi and Enju Sakai and Makoto Minohara and Taichi Mitsuhashi and Atsushi Fujimori and Takuro Nagai and Hiroshi Fujioka and Hiroshi Kumigashira",

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T1 - Spatial distribution of transferred charges across the heterointerface between perovskite transition metal oxides LaNiO3 and LaMnO3

AU - Kitamura, Miho

AU - Horiba, Koji

AU - Kobayashi, Masaki

AU - Sakai, Enju

AU - Minohara, Makoto

AU - Mitsuhashi, Taichi

AU - Fujimori, Atsushi

AU - Nagai, Takuro

AU - Fujioka, Hiroshi

AU - Kumigashira, Hiroshi

PY - 2016/3/14

Y1 - 2016/3/14

N2 - To investigate the interfacial charge-transfer phenomena between perovskite transition metal oxides LaNiO3 (LNO) and LaMnO3 (LMO), we have performed in situ x-ray absorption spectroscopy (XAS) measurements on LNO/LMO multilayers. The Ni-L2,3 and Mn-L2,3 XAS spectra clearly show the occurrence of electron transfer from Mn to Ni ions in the interface region. Detailed analysis of the thickness dependence of these XAS spectra has revealed that the spatial distribution of the transferred charges across the interface is significantly different between the two constituent layers. The observed spatial distribution is presumably described by the charge spreading model that treats the transfer integral between neighboring transition metal ions and the Coulomb interaction, rather than the Thomas-Fermi screening model.

AB - To investigate the interfacial charge-transfer phenomena between perovskite transition metal oxides LaNiO3 (LNO) and LaMnO3 (LMO), we have performed in situ x-ray absorption spectroscopy (XAS) measurements on LNO/LMO multilayers. The Ni-L2,3 and Mn-L2,3 XAS spectra clearly show the occurrence of electron transfer from Mn to Ni ions in the interface region. Detailed analysis of the thickness dependence of these XAS spectra has revealed that the spatial distribution of the transferred charges across the interface is significantly different between the two constituent layers. The observed spatial distribution is presumably described by the charge spreading model that treats the transfer integral between neighboring transition metal ions and the Coulomb interaction, rather than the Thomas-Fermi screening model.

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Spatial distribution of transferred charges across the heterointerface between perovskite transition metal oxides LaNiO₃ and LaMnO₃

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