The Japan Society of Applied Physics

2022 International Conference on Solid State Devices and Materials

2022 International Conference on Solid State Devices and Materials

2022年9月26日 〜 2022年12月23日
幕張メッセ

13:30 〜 13:45

[B-6-01] Correlation between Dipole Layer Formation and Surface Terminating Crystal Face in Perovskite Oxide Epitaxial Stacks Clarified by Lateral Force Microscopy

〇Atsushi Tamura1, Koji Kita1,2 (1. Dept. of Materials Engineering, Univ. of Tokyo (Japan), 2. Dept. of Advanced Materials Science, Univ. of Tokyo (Japan))

Presentation style: On-site (in-person)

https://doi.org/10.7567/SSDM.2022.B-6-01

Dipole layer formation in perovskite epitaxial stacks is considered to be affected by the stacking sequence of monatomic layers of polar oxide (LaAlO3 (LAO)). It was found that the magnitude of dipoles in LAO/SRO(SrRuO3) stacks were significantly different only by inserting a few monolayers of SrAlOx (SAO) between LAO and SRO. The statistical analysis of lateral force microscopy (LFM) images on LAO clarified a difference in dominant sur-face terminating crystal faces. These results support the correlation between the interfacial dipole layer for-mation and the stacking sequence of monatomic layers of LAO.