Giant Discrete Steps in Metal-Insulator Transition in Perovskite Manganite Wires

Journal Article · Sun Jan 01 04:00:00 EST 2006 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.97.167201· OSTI ID:978211

Zhai, Hong-Ying ^[1]; Ma, Jianxing ^[1]; Gillaspie, Dane Thomas ^[1]; Zhang, Xiaoguang ^[1]; Ward, Thomas Z ^[1]; Plummer, E Ward ^[1]; Shen, Jian ^[1]

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1. ORNL

Optical lithography is used to fabricate LPCMO wires starting from a single (La{sub 5/8-0.3}Pr{sub 0.3})Ca{sub 3/8}MnO{sub 3} (LPCMO) film epitaxially grown on a LaAlO{sub 3}(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.

• Research Organization: Oak Ridge National Laboratory (ORNL)
• Sponsoring Organization: ORNL LDRD Director's R&D
• DOE Contract Number: AC05-00OR22725
• OSTI ID: 978211
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 16 Vol. 97; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
CONFINEMENT
MAGNETIC FIELDS
ORIGIN
PEROVSKITE
TRANSPORT