Electronic structures of the SrTiO3(110) surface in different reconstructions
Electronic structures of the SrTiO3(110) surface in different reconstructions
复制标题
不同重构中SrTiO3(110)表面的电子结构
DOI：
10.1063/1.4737946
复制
发表时间：
2012-07-28
影响因子：
4.4
通讯作者：
Guo, Jiandong
中科院分区：
文献类型：
--
作者：
Cao, Yanwei;Wang, Shuai;Guo, Jiandong
在SrTiO_3（110）单晶表面制备了不同结构的单相表面。表面Ti浓度的增加是导致重构从（4x 1）到（2x 8）以及到新的（1x 10）结构的演变的原因。它还诱导的表面金属性的增强，其特征在于通过电子和光电子能谱测量的间隙状态和增加的Drude重量的外观。我们将金属性归因于还原的Ti离子，这与观察到的能带结构和声子能量的移动是一致的。结果表明，通过简单的处理，可以在还原的钛酸盐层和具有独特电子结构的SrTiO_3晶体之间获得异质界面。(C)2012年美国物理学会。[http：//dx.doi.org/10.1063/1.4737946]
The surface of SrTiO3(110) single crystal is prepared in monophase with different reconstructions. The increase of surface Ti concentration is responsible for the evolution of the reconstruction from (4x1) to (2x8), and to a new (1x10) structure. It also induces the enhancement of the surface metallicity, characterized by the appearance of the in-gap states and the increasing Drude weight as measured by the electron and photoelectron spectroscopies. We attribute the metallicity to the reduced Ti ions, which is consistent with the observed band structures and the shift of the phonon energy. It is indicated that a heterointerface between a reduced titanate layer and SrTiO3 crystal with unique electronic structure can be obtained by the simple treatment. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4737946]