Termination control of the interface dipole in La0.7Sr0.3MnO3/Nb:SrTiO3 (001) Schottky junctions
Termination control of the interface dipole in La0.7Sr0.3MnO3/Nb:SrTiO3 (001) Schottky junctions
复制标题
DOI：
10.1103/physrevb.79.073101
复制
发表时间：
2009-02-01
影响因子：
3.7
通讯作者：
Hwang, Harold Y.
中科院分区：
文献类型：
--
作者：
Hikita, Yasuyuki;Nishikawa, Mitsuru;Hwang, Harold Y.
为了研究钙钛矿能带排列的界面终止依赖性，我们研究了La0.7Sr0.3MnO3/Nb:SrTiO3 (001)异质界面处的肖特基势垒高度。由于 Nb:SrTiO3 半导体通过 SrMnO3 层的不同插入而从 TiO2 终端变为 SrO 终端，因此观察到肖特基势垒高度的大幅系统增加。这可以归因于界面偶极子的演变，以屏蔽界面处的极性不连续性，这为调谐氧化物中的能带图提供了很大的内部自由度。
In order to investigate the interface termination dependence of perovskite band alignments, we have studied the Schottky barrier height at La0.7Sr0.3MnO3/Nb:SrTiO3 (001) heterointerfaces. As the Nb:SrTiO3 semiconductor was varied from TiO2 termination to SrO termination by variable insertion of a SrMnO3 layer, a large systematic increase in the Schottky barrier height was observed. This can be ascribed to the evolution of the interface dipole induced to screen the polar discontinuity at the interface, which gives a large internal degree of freedom for tuning band diagrams in oxides.