Giant discrete steps in metal-insulator transition in perovskite manganite wires

Optical lithography is used to fabricate LPCMO wires starting from a single (La(5/8-0.3)Pr(0.3))Ca3/8MnO3 (LPCMO) film epitaxially grown on a LaAlO3(100) substrate. As the width of the wires is decreased, the resistivity of the LPCMO wires exhibits giant and ultrasharp steps upon varying temperature...

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Published inPhysical review letters Vol. 97; no. 16; p. 167201
Main Authors Zhai, Hong-Ying, Ma, J X, Gillaspie, D T, Zhang, X G, Ward, T Z, Plummer, E W, Shen, J
Format Journal Article
LanguageEnglish
Published United States 20.10.2006
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Summary:Optical lithography is used to fabricate LPCMO wires starting from a single (La(5/8-0.3)Pr(0.3))Ca3/8MnO3 (LPCMO) film epitaxially grown on a LaAlO3(100) substrate. As the width of the wires is decreased, the resistivity of the LPCMO wires exhibits giant and ultrasharp steps upon varying temperature and magnetic field in the vicinity of the metal-insulator transition. The origin of the ultrasharp transitions is attributed to the effect of spatial confinement on the percolative transport in manganites.
ISSN:0031-9007
DOI:10.1103/physrevlett.97.167201