Spatial distribution of transferred charges across the heterointerface between perovskite transition metal oxides LaNiO{sub 3} and LaMnO{sub 3}

Journal Article · Mon Mar 14 00:00:00 EDT 2016 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4944418· OSTI ID:22591435

Kitamura, Miho ^[1]; Horiba, Koji; Kobayashi, Masaki; Sakai, Enju; Minohara, Makoto; Mitsuhashi, Taichi; Kumigashira, Hiroshi ^[2]; Fujimori, Atsushi ^[3]; Nagai, Takuro ^[4]; Fujioka, Hiroshi ^[1]

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1. Institute of Industrial Science, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8505 (Japan)
2. Photon Factory, Institute of Materials Structure Science, High Energy Accelerator Research Organization (KEK), 1-1 Oho, Tsukuba 305-0801 (Japan)
3. Department of Physics, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033 (Japan)
4. National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba 305-0044 (Japan)

To investigate the interfacial charge-transfer phenomena between perovskite transition metal oxides LaNiO{sub 3} (LNO) and LaMnO{sub 3} (LMO), we have performed in situ x-ray absorption spectroscopy (XAS) measurements on LNO/LMO multilayers. The Ni-L{sub 2,3} and Mn-L{sub 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.

• OSTI ID: 22591435
• Journal Information: Applied Physics Letters, Vol. 108, Issue 11; Other Information: (c) 2016 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ABSORPTION SPECTROSCOPY
ELECTRON TRANSFER
LANTHANUM COMPOUNDS
LAYERS
MANGANATES
NICKEL IONS
OXIDES
PEROVSKITE
SPATIAL DISTRIBUTION
SPECTRA
THICKNESS
THOMAS-FERMI MODEL
TRANSITION ELEMENTS
X-RAY SPECTROSCOPY