Structural comparison of n-type and p-type LaAlO3/SrTiO 3 interfaces

Ryosuke Yamamoto, Christopher Bell, Yasuyuki Hikita, Harold Y. Hwang, Hiroyuki Nakamura, Tsuyoshi Kimura, Yusuke Wakabayashi

研究成果: Article査読

60 被引用数 (Scopus)

抄録

Using a surface x-ray diffraction technique, we investigated the atomic structure of two types of interfaces between LaAlO3 and SrTiO 3, that is, p-type (SrO/AlO2) and n-type (TiO 2/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 ptype. 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.

本文言語English
論文番号036104
ジャーナルPhysical review letters
107
3
DOI
出版ステータスPublished - 2011 7 15
外部発表はい

ASJC Scopus subject areas

  • 物理学および天文学(全般)

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