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

Haoran Xu; Binbin Chen; Feng Jin; Zhuang Guo; Guanyin Gao; Feng Chen; Wenbin Wu

doi:10.1088/2053-1591/3/12/126403

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

Haoran Xu
, Binbin Chen
, Feng Jin
, Zhuang Guo
, Guanyin Gao
, Feng Chen
, Wenbin Wu

Research output: Contribution to journal › Article › peer-review

4 Scopus citations

Abstract

Transport characteristics of CaRuO₃(CRO)/SmFeO₃(SFO) superlattices are studied as a function of the thickness ofCRO(0.8 nm≤^tCRO≤3.2 nm). An abrupt enhancement of the conductivity is observed on superlattices, although ultrathinCROfilm show a very high resistance and SFO single layer is insulating. The superlattices with tCRO between 2.0 and 3.2 nmretain a metallic state. As tCRO decreases to 1.6 nmor 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 tCRO value, which causes a change from weak localization to strong localization.

Original language	English
Article number	126403
Journal	Materials Research Express
Volume	3
Issue number	12
DOIs	https://doi.org/10.1088/2053-1591/3/12/126403
State	Published - Dec 2016
Externally published	Yes

Keywords

Metal-insulator transition
Perovsikte oxide superlattice
Resistivity

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10.1088/2053-1591/3/12/126403

Cite this

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title = "Enhanced conductivity and metal-insulator transition of ultrathin CaRuO3 in superlattices",

abstract = "Transport characteristics of CaRuO3(CRO)/SmFeO3(SFO) superlattices are studied as a function of the thickness ofCRO(0.8 nm≤tCRO≤3.2 nm). An abrupt enhancement of the conductivity is observed on superlattices, although ultrathinCROfilm show a very high resistance and SFO single layer is insulating. The superlattices with tCRO between 2.0 and 3.2 nmretain a metallic state. As tCRO decreases to 1.6 nmor 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 tCRO value, which causes a change from weak localization to strong localization.",

keywords = "Metal-insulator transition, Perovsikte oxide superlattice, Resistivity",

author = "Haoran Xu and Binbin Chen and Feng Jin and Zhuang Guo and Guanyin Gao and Feng Chen and Wenbin Wu",

note = "Publisher Copyright: {\textcopyright}2016 IOP Publishing Ltd.",

year = "2016",

month = dec,

doi = "10.1088/2053-1591/3/12/126403",

language = "英语",

volume = "3",

journal = "Materials Research Express",

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TY - JOUR

T1 - Enhanced conductivity and metal-insulator transition of ultrathin CaRuO3 in superlattices

AU - Xu, Haoran

AU - Chen, Binbin

AU - Jin, Feng

AU - Guo, Zhuang

AU - Gao, Guanyin

AU - Chen, Feng

AU - Wu, Wenbin

PY - 2016/12

Y1 - 2016/12

N2 - Transport characteristics of CaRuO3(CRO)/SmFeO3(SFO) superlattices are studied as a function of the thickness ofCRO(0.8 nm≤tCRO≤3.2 nm). An abrupt enhancement of the conductivity is observed on superlattices, although ultrathinCROfilm show a very high resistance and SFO single layer is insulating. The superlattices with tCRO between 2.0 and 3.2 nmretain a metallic state. As tCRO decreases to 1.6 nmor 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 tCRO value, which causes a change from weak localization to strong localization.

AB - Transport characteristics of CaRuO3(CRO)/SmFeO3(SFO) superlattices are studied as a function of the thickness ofCRO(0.8 nm≤tCRO≤3.2 nm). An abrupt enhancement of the conductivity is observed on superlattices, although ultrathinCROfilm show a very high resistance and SFO single layer is insulating. The superlattices with tCRO between 2.0 and 3.2 nmretain a metallic state. As tCRO decreases to 1.6 nmor 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 tCRO value, which causes a change from weak localization to strong localization.

KW - Metal-insulator transition

KW - Perovsikte oxide superlattice

KW - Resistivity

UR - https://www.scopus.com/pages/publications/85007453764

U2 - 10.1088/2053-1591/3/12/126403

DO - 10.1088/2053-1591/3/12/126403

M3 - 文章

AN - SCOPUS:85007453764

SN - 2053-1591

VL - 3

JO - Materials Research Express

JF - Materials Research Express

IS - 12

M1 - 126403

ER -

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

Abstract

Keywords

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