Band offset measurements and magneto-transport properties of epitaxial TiO2-x (x=0.05)/La0.7Sr0.3MnO3 heterostructure

被引：6

作者：

Choudhary, R. J. ^{[1
]}

Bapna, Komal ^{[1
]}

Phase, D. M. ^{[1
]}

机构：

[1] UGC DAE Consortium Sci Res, Indore 452001, Madhya Pradesh, India

来源：

APPLIED PHYSICS LETTERS | 2013年 / 102卷 / 14期

关键词：

MAGNETORESISTANCE; FILMS; OXIDE;

D O I：

10.1063/1.4801845

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We have studied the electronic transport behaviour and band offset properties of the epitaxial TiO2-x (x = 0.05)/La0.7Sr0.3MnO3 hetero-structure. The bilayer shows non-linear I-V characteristics at different temperatures as well as negative magneto-resistance with the application of magnetic field. Valence band offset (VBO) was measured using photoelectron spectroscopy and consequently the conduction band offset (CBO) was determined. It is found that type-I alignment takes place at the interface. The value for CBO (1.1 eV) is much lower than VBO (2.3 eV), suggesting that transport is mainly dominated by electrons. Observed negative magneto-resistance in such bilayer is explained with the help of band structure of La0.7Sr0.3MnO3. (C) 2013 AIP Publishing LLC

引用

页数：4

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