CHARACTERIZATION OF SURFACE-DEFECTS FORMATION IN STRONTIUM-TITANATE (100)
CHARACTERIZATION OF SURFACE-DEFECTS FORMATION IN STRONTIUM-TITANATE (100)
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DOI：
10.1016/0039-6028(94)91374-9
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发表时间：
1994-05-01
期刊：
影响因子：
1.9
通讯作者：
KOMA, A
中科院分区：
文献类型：
--
作者：
HIRATA, A;ANDO, A;KOMA, A
用电子能量损失谱和俄歇电子能谱研究了不同处理后的钛酸锶(100)表面的电子性质。在氧气氛为5×10(-5)Pa910K的条件下，可获得无污染的化学计量比表面。在910K超高真空(UHV)下加热的表面在带隙区域出现了一种新的表面态，这种表面态来自于顶层Ti-O2层的氧空位。这种状态也是由电子辐照或Ar离子轰击产生的。
The electronic properties of SrTiO3(100) surfaces after various treatments have been studied by electron energy loss spectroscopy and Auger electron spectroscopy. A stoichiometric surface without contamination can be obtained by annealing at 910 K under oxygen atmosphere of 5 x 10(-5) Pa. The surface heated under ultrahigh vacuum (UHV) at 910 K exhibits a new surface state in the band gap region, which comes from oxygen vacancies at the top Ti-O2 layer. This state is also produced by electron irradiation or Ar-ion bombardment.