Mg原子在MgO/Ag（001）埋层界面嵌入的层分辨研究
Layer-resolved study of Mg atom incorporation at MgO/Ag(001) buried interface
摘要：
结合X射线激发俄歇电子衍射实验和多重散射计算，我们揭示了Ag（001）衬底上MgO_（12）薄膜（4-6 μ m）中MgKL_（23）L_（23）俄歇跃迁的层分辨位移。利用该分辨率来证明通过将MgO膜暴露于Mg熔剂来控制Mg原子在MgO/Ag（001）界面处并入的可能性。MgO/Ag（001）功函数的显著降低在暴露阶段期间被观察到，并且反映了在界面处的带偏移变化和氧化物膜中的带弯曲效应。
英文摘要：
By combining x-ray excited Auger electron diffraction experiments and multiple scattering calculations we reveal a layer-resolved shift for the Mg KL23L23 Auger transition in MgO ultrathin films (4-6 Å) on Ag(001). This resolution is exploited to demonstrate the possibility to control Mg atoms incorporation at the MgO/Ag(001) interface by exposing the MgO films to a Mg flux. A substantial reduction of the MgO/Ag(001) work function is observed during the exposition phase and reflects, both band-offset variations at the interface and band bending effects in the oxide film.
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