Structural comparison of n-type and p-type LaAlO3/SrTiO3 interfaces |
| |
Authors: | Yamamoto Ryosuke Bell Christopher Hikita Yasuyuki Hwang Harold Y Nakamura Hiroyuki Kimura Tsuyoshi Wakabayashi Yusuke |
| |
Institution: | Division of Materials Physics, Graduate School of Engineering Science, Osaka University, Toyonaka 560-8531, Japan. |
| |
Abstract: | Using a surface x-ray diffraction technique, we investigated the atomic structure of two types of interfaces between LaAlO3 and SrTiO3, that is, p-type (SrO/AlO2) and n-type (TiO2/LaO) interfaces. Our results demonstrate that the SrTiO3 in the sample with the n-type interface has a large polarized region, while that with the p-type interface has a limited polarized region. In addition, atomic intermixing was observed to extend deeper into the SrTiO3 substrate at the n-type interface compared to the p type. These differences result in distinct degrees of band bending, which likely contributes to the striking contrast in electrical conductivity between the two types of interfaces. |
| |
Keywords: | |
本文献已被 PubMed 等数据库收录! |
|