Electronic depth profiles with atomic layer resolution from resonant soft x-ray reflectivity
Electronic depth profiles with atomic layer resolution from resonant soft x-ray reflectivity
复制标题
通过共振软 X 射线反射率获得具有原子层分辨率的电子深度剖面
DOI:
10.1088/1367-2630/17/8/083046
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发表时间:
2015
影响因子:
3.3
通讯作者:
J. Geck
中科院分区:
文献类型:
--
作者:
M. Zwiebler;J. E. Hamann-Borrero;M. Vafaee;P. Komissinskiy;S. Macke;R. Sutarto;B. Buchner;G. A. Sawatzky;L. Alff;J. Geck
The analysis of x-ray reflectivity data from artificial heterostructures usually relies on the homogeneity of optical properties of the constituent materials. However, when the x-ray energy is tuned to the absorption edge of a particular resonant site, this assumption may no longer be appropriate. For samples realizing lattice planes with and without resonant sites, the corresponding regions containing the sites at resonance will have optical properties very different from regions without those sites. In this situation, models assuming homogeneous optical properties throughout the material can fail to describe the reflectivity adequately. As we show here, resonant soft x-ray reflectivity is sensitive to these variations, even though the wavelength is typically large as compared to the atomic distances over which the optical properties vary. We have therefore developed a scheme for analyzing resonant soft x-ray reflectivity data, which takes the atomic structure of a material into account by'slicing'it into atomic planes with characteristic optical properties. Using LaSrMnO 4 as an example, we discuss both the theoretical and experimental implications of this approach. Our analysis not only allows to determine important structural information such as interface terminations and stacking of atomic layers, but also enables to extract depth-resolved spectroscopic information with atomic resolution, thus enhancing the capability of the technique to study emergent phenomena at surfaces and interfaces.
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DOI:
--
发表时间:
2006
期刊:
影响因子:
--
作者:
A. Mirone;S. Dhesi;G. Laan
通讯作者:
G. Laan
DOI:
--
发表时间:
2012
期刊:
影响因子:
--
作者:
K. Stone;S. M. Valvidares;J. Kortright
通讯作者:
J. Kortright
DOI:
--
发表时间:
2006
期刊:
影响因子:
--
作者:
A. Mirone;S. Dhesi;G. van der Laan
通讯作者:
G. van der Laan
影响因子:
3.7
作者:
Haage, T;Zegenhagen, J;Kronmuller, H
通讯作者:
Kronmuller, H
影响因子:
3.7
作者:
Malik, V. K.;Marozau, I.;Bernhard, C.
通讯作者:
Bernhard, C.