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通过原位X射线衍射观察到Si(111)上超薄Gd2O3层的延迟结晶。

Delayed crystallization of ultrathin Gd2O3 layers on Si(111) observed by in situ X-ray diffraction.

作者信息

Hanke Michael, Kaganer Vladimir M, Bierwagen Oliver, Niehle Michael, Trampert Achim

机构信息

Paul-Drude-Institut für Festkörperelektronik, Hausvogteiplatz 5-7, Berlin, D-10117, Germany.

出版信息

Nanoscale Res Lett. 2012 Mar 29;7(1):203. doi: 10.1186/1556-276X-7-203.

DOI:10.1186/1556-276X-7-203
PMID:22458962
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC3343629/
Abstract

We studied the early stages of Gd2O3 epitaxy on Si(111) in real time by synchrotron-based, high-resolution X-ray diffraction and by reflection high-energy electron diffraction. A comparison between model calculations and the measured X-ray scattering, and the change of reflection high-energy electron diffraction patterns both indicate that the growth begins without forming a three-dimensional crystalline film. The cubic bixbyite structure of Gd2O3 appears only after a few monolayers of deposition.

摘要

我们通过基于同步加速器的高分辨率X射线衍射和反射高能电子衍射实时研究了Gd2O3在Si(111)上的早期外延生长阶段。模型计算与测量的X射线散射之间的比较以及反射高能电子衍射图案的变化均表明，生长开始时并未形成三维晶体薄膜。Gd2O3的立方铁铈矿结构仅在沉积几层后才出现。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/299b/3343629/50d7f9f36f70/1556-276X-7-203-4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/299b/3343629/738bbac2bd3d/1556-276X-7-203-1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/299b/3343629/4ec5a6f98065/1556-276X-7-203-2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/299b/3343629/eff86718964f/1556-276X-7-203-3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/299b/3343629/50d7f9f36f70/1556-276X-7-203-4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/299b/3343629/738bbac2bd3d/1556-276X-7-203-1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/299b/3343629/4ec5a6f98065/1556-276X-7-203-2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/299b/3343629/eff86718964f/1556-276X-7-203-3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/299b/3343629/50d7f9f36f70/1556-276X-7-203-4.jpg

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本文引用的文献

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Reconstruction of the Pt(111) surface: X-ray-scattering measurements.铂（111）表面的重构：X射线散射测量
Phys Rev B Condens Matter. 1993 Dec 15;48(24):18119-18139. doi: 10.1103/physrevb.48.18119.