文章基本信息

标题：Atomic-Scale Fingerprint of Mn Dopant at the Surface of Sr₃(Ru_1−xMn_x)₂O₇
本地全文：下载
作者：Guorong Li ; Qing Li ; Minghu Pan 等
期刊名称：Scientific Reports
电子版ISSN：2045-2322
出版年度：2013
卷号：3
DOI：10.1038/srep02882
出版社：Springer Nature
摘要：Chemical doping in materials is known to give rise to emergent phenomena. These phenomena are extremely difficult to predict a priori , because electron-electron interactions are entangled with local environment of assembled atoms. Scanning tunneling microscopy and low energy electron diffraction are combined to investigate how the local electronic structure is correlated with lattice distortion on the surface of Sr₃(Ru_{1− x}Mn _x )₂O₇, which has double-layer building blocks formed by (Ru/Mn)O₆ octahedra with rotational distortion. The presence of doping-dependent tilt distortion of (Ru/Mn)O₆ octahedra at the surface results in a C_{2 v} broken symmetry in contrast with the bulk C_{4 v} counterpart. It also enables us to observe two Mn sites associated with the octahedral rotation in the bulk through the “chirality” of local electronic density of states surrounding Mn, which is randomly distributed. These results serve as fingerprint of chemical doping on the atomic scale.