Enhanced conductivity and metal-insulator transition of ultrathin CaRuO3 in superlattices

被引：3

作者：

Xu, Haoran ^{[1
]}

Chen, Binbin ^{[1
]}

Jin, Feng ^{[1
]}

Guo, Zhuang ^{[1
]}

Gao, Guanyin ^{[1
]}

Chen, Feng ^{[2
]}

Wu, Wenbin ^{[1
,2
]}

机构：

[1] Univ Sci & Technol China, Hefei Natl Lab Phys Sci Microscale, Hefei 230026, Peoples R China

[2] Chinese Acad Sci, High Field Magnet Lab, Hefei 230031, Peoples R China

来源：

MATERIALS RESEARCH EXPRESS | 2016年 / 3卷 / 12期

关键词：

metal-insulator transition; perovsikte oxide superlattice; resistivity; OXIDE HETEROSTRUCTURES; SINGLE-CRYSTAL; ELECTRONICS; PEROVSKITES; ABSENCE; PHYSICS;

D O I：

10.1088/2053-1591/3/12/126403

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Transport characteristics of CaRuO3 (CRO)/SmFeO3 (SFO) superlattices are studied as a function of the thickness of CRO (0.8 nm <= t(CRO) <= 3.2 nm). An abrupt enhancement of the conductivity is observed on superlattices, although ultrathin CRO film show a very high resistance and SFO single layer is insulating. The superlattices with tCRO between 2.0 and 3.2 nm retain a metallic state. As tCRO decreases to 1.6 nm or even thinner in superlattices, the metallic state turns to insulating state. The metal-insulator transition could be attributed to the comparable scale for the disorder length and the electron travel distance at small t(CRO) value, which causes a change from weak localization to strong localization.

引用

页数：7

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