Anatase TiO2 thin films grown on lattice-matched LaAiO3 substrate by laser molecular-beam epitaxy

M. Murakami; Y. Matsumoto; K. Nakajima; T. Makino; Y. Segawa; T. Chikyow; P. Ahmet; M. Kawasaki; H. Koinuma

doi:10.1063/1.1365412

Anatase TiO₂ thin films grown on lattice-matched LaAiO₃ substrate by laser molecular-beam epitaxy

M. Murakami, Y. Matsumoto, K. Nakajima, T. Makino, Y. Segawa, T. Chikyow, P. Ahmet, M. Kawasaki, H. Koinuma

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

140 Citations (Scopus)

Abstract

Epitaxial anatase thin films were fabricated on lattice-matched (-0.2%) LaAIO₃ (001) substrates in the layer-by-layer fashion by laser molecular-beam epitaxy. X-ray diffraction and transmission electron microscope show the films to exhibit high crystallinity and atomically defined interfaces. By virtue of the adoption of LaAIO₃ substrate, which is transparent to photoexcitation of TiO₂, optical band gaps could be determined to be 3.3 eV at room temperature. A photoluminescence band due to recombination of self-trapped excitons was observed at 5 K to give the peak maximum at 2.2 eV. As a result of the high degree of orientation of the epitaxial films, anisotropic optical absorption was clearly observed.

Original language	English
Pages (from-to)	2664-2666
Number of pages	3
Journal	Applied Physics Letters
Volume	78
Issue number	18
DOIs	https://doi.org/10.1063/1.1365412
Publication status	Published - 2001 Apr 30
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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title = "Anatase TiO2 thin films grown on lattice-matched LaAiO3 substrate by laser molecular-beam epitaxy",

abstract = "Epitaxial anatase thin films were fabricated on lattice-matched (-0.2%) LaAIO3 (001) substrates in the layer-by-layer fashion by laser molecular-beam epitaxy. X-ray diffraction and transmission electron microscope show the films to exhibit high crystallinity and atomically defined interfaces. By virtue of the adoption of LaAIO3 substrate, which is transparent to photoexcitation of TiO2, optical band gaps could be determined to be 3.3 eV at room temperature. A photoluminescence band due to recombination of self-trapped excitons was observed at 5 K to give the peak maximum at 2.2 eV. As a result of the high degree of orientation of the epitaxial films, anisotropic optical absorption was clearly observed.",

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T1 - Anatase TiO2 thin films grown on lattice-matched LaAiO3 substrate by laser molecular-beam epitaxy

AU - Murakami, M.

AU - Matsumoto, Y.

AU - Nakajima, K.

AU - Makino, T.

AU - Segawa, Y.

AU - Chikyow, T.

AU - Ahmet, P.

AU - Kawasaki, M.

AU - Koinuma, H.

PY - 2001/4/30

Y1 - 2001/4/30

N2 - Epitaxial anatase thin films were fabricated on lattice-matched (-0.2%) LaAIO3 (001) substrates in the layer-by-layer fashion by laser molecular-beam epitaxy. X-ray diffraction and transmission electron microscope show the films to exhibit high crystallinity and atomically defined interfaces. By virtue of the adoption of LaAIO3 substrate, which is transparent to photoexcitation of TiO2, optical band gaps could be determined to be 3.3 eV at room temperature. A photoluminescence band due to recombination of self-trapped excitons was observed at 5 K to give the peak maximum at 2.2 eV. As a result of the high degree of orientation of the epitaxial films, anisotropic optical absorption was clearly observed.

AB - Epitaxial anatase thin films were fabricated on lattice-matched (-0.2%) LaAIO3 (001) substrates in the layer-by-layer fashion by laser molecular-beam epitaxy. X-ray diffraction and transmission electron microscope show the films to exhibit high crystallinity and atomically defined interfaces. By virtue of the adoption of LaAIO3 substrate, which is transparent to photoexcitation of TiO2, optical band gaps could be determined to be 3.3 eV at room temperature. A photoluminescence band due to recombination of self-trapped excitons was observed at 5 K to give the peak maximum at 2.2 eV. As a result of the high degree of orientation of the epitaxial films, anisotropic optical absorption was clearly observed.

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Anatase TiO₂ thin films grown on lattice-matched LaAiO₃ substrate by laser molecular-beam epitaxy

Abstract

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