论文类型：期刊论文
第一作者：杨哲
通讯作者：童浩
合写作者：缪向水,程晓敏,徐明
发表刊物：SCIENTIFIC REPORTS
所属单位：华中科技大学
学科门类：工学
一级学科：电子科学与技术
文献类型：J
卷号：7
DOI码：10.1038/s41598-017-17671-w
发表时间：4307-12-01
摘要：Superlattices consisting of stacked nano-sized GeTe and Sb2Te3 blocks have attracted considerable attention owing to their potential for an ecient non-melting switching mechanism, associated with complex bonding between blocks. Here, we propose possible atomic models for the superlattices, characterized by dierent interfacial bonding types. Based on interplanar distances extracted from ab initio calculations and electron diraction measurements, we reveal possible intercalation of dangling bonds as the GeTe content in the superlattice increases. The dangling bonds were further conrmed by X-ray photoelectron spectroscopy, anisotropic temperature dependent resistivity measurements down to 2 K and magnetotransport analysis. Changes of partially coherent decoupled topological surfaces states upon dangling bonds varying contributed to the switching mechanism. Furthermore, the topological surface states controlled by changing the bonding between stacking blocks may be optimized for multi-functional applications
发布期刊链接：https://www.nature.com/articles/s41598-017-17671-w