文章基本信息

标题：Interface polarization model for a 2-dimensional electron gas at the BaSnO3/LaInO3 interface
本地全文：下载
作者：Young Mo Kim ; T. Markurt ; Youjung Kim 等
期刊名称：Scientific Reports
电子版ISSN：2045-2322
出版年度：2019
卷号：9
期号：1
页码：1-9
DOI：10.1038/s41598-019-52772-8
出版社：Springer Nature
摘要：In order to explain the experimental sheet carrier density n 2D at the interface of BaSnO 3 /LaInO 3 , we consider a model that is based on the presence of interface polarization in LaInO 3 which extends over 2 pseudocubic unit cells from the interface and eventually disappears in the next 2 unit cells. Considering such interface polarization in calculations based on 1D Poisson-Schrödinger equations, we consistently explain the dependence of the sheet carrier density of BaSnO 3 /LaInO 3 heterinterfaces on the thickness of the LaInO 3 layer and the La doping of the BaSnO 3 layer. Our model is supported by a quantitative analysis of atomic position obtained from high resolution transmission electron microscopy which evidences suppression of the octahedral tilt and a vertical lattice expansion in LaInO 3 over 2-3 pseudocubic unit cells at the coherently strained interface.