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 journalArticlepeer-review

149 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 languageEnglish
Pages (from-to)2664-2666
Number of pages3
JournalApplied Physics Letters
Volume78
Issue number18
DOIs
Publication statusPublished - 2001 Apr 30
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Fingerprint Dive into the research topics of 'Anatase TiO<sub>2</sub> thin films grown on lattice-matched LaAiO<sub>3</sub> substrate by laser molecular-beam epitaxy'. Together they form a unique fingerprint.

Cite this