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

  • Hong Ying Zhai
  • , J. X. Ma
  • , D. T. Gillaspie
  • , X. G. Zhang
  • , T. Z. Ward
  • , E. W. Plummer
  • , J. Shen

Research output: Contribution to journalArticlepeer-review

106 Scopus citations

Abstract

Optical lithography is used to fabricate LPCMO wires starting from a single (La5/8-0.3Pr0.3)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.

Original languageEnglish
Article number167201
JournalPhysical Review Letters
Volume97
Issue number16
DOIs
StatePublished - 2006

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