Atomic-scale investigations of perovskite oxide heteroepitaxy

Takeo OHSAWA; Ryota SHIMIZU; Katsuya IWAYA; Susumu SHIRAKI; Taro HITOSUGI

doi:10.2109/jcersj2.122.456

Papers

Atomic-scale investigations of perovskite oxide heteroepitaxy

Takeo OHSAWA, Ryota SHIMIZU, Katsuya IWAYA, Susumu SHIRAKI, Taro HITOSUGI

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Keywords: Oxide film growth, Pulsed laser deposition, Scanning tunneling microscopy

JOURNAL FREE ACCESS

2014 Volume 122 Issue 1426 Pages 456-459

DOI https://doi.org/10.2109/jcersj2.122.456

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Abstract

We have developed a low-temperature, high-magnetic-field scanning tunneling microscope combined with pulsed laser deposition. This system enables us to study atomic-scale growth of oxide thin films. In this paper, we investigated growth-mode-controlled epitaxial SrTiO₃ (STO) and LaAlO₃ films on STO(001) single-crystal substrates. A (√13×√13)-R33.7° STO(001) substrate, prepared in oxygen atmosphere, is atomically resolved and plays a crucial role in elucidating the initial growth process. Atomic-scale microscopic approach performed in this study opens up a way to novel functionalities in oxide thin films and heterostructures.

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