[22p-12J-1~9] 13.3 Insulator technology

1:30 PM - 1:45 PM JST(4:30 AM - 4:45 AM UTC)Presentation by Applicant for JSAP Young Scientists Presentation Award

[22p-12J-1] Relationship between microscopic and macroscopic band offset and leakage current in perovskite oxide epitaxial thin films

〇Atsushi Tamura¹, Koji Kita^1,2 (1.School of Eng., The Univ. of Tokyo, 2.GSFS, The Univ. of Tokyo)

Keywords:

dipole,perovskite,leakage current

At the epitaxial interface of perovskite oxides, the insertion of a dipole layer causes an interfacial dipole effect, which increases the insulator-to-metal offset. In this study, we used C-AFM to observe the relationship between the distribution of this offset and the electrical characteristics. The macroscopic offset variation observed by XPS, which is associated with the modulation of the dipole effect, is consistent with the result estimated from the average of the local offsets estimated by I-V characteristics, indicating offset modulation by the dipole effect.