title: Giant discrete steps in metal-insulator transition in perovskite manganite wires.
abstract: 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.
authors.affiliation: Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA.
authors.forename: Hong-Ying
authors.initials: HY
authors.lastname: Zhai
authors.forename: J X
authors.initials: JX
authors.lastname: Ma
authors.forename: D T
authors.initials: DT
authors.lastname: Gillaspie
authors.forename: X G
authors.initials: XG
authors.lastname: Zhang
authors.forename: T Z
authors.initials: TZ
authors.lastname: Ward
authors.forename: E W
authors.initials: EW
authors.lastname: Plummer
authors.forename: J
authors.initials: J
authors.lastname: Shen