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Intrinsic Inhomogeneities in Manganite Thin Films Investigated with Scanning Tunneling Spectroscopy

By T. Becker, C. Streng, Y. Luo, V. Moshnyaga, B. Damaschke, Nic Shannon and K. Samwer

Abstract

Thin films of La0.7Sr0.3MnO3 on MgO show a metal insulator transition and colossal magnetoresistance. The shape of this transition can be explained by intrinsic spatial inhomogeneities, which give rise to a domain structure of conducting and insulating domains at the submicrometer scale. These domains then undergo a percolation transition. The tunneling conductance and tunneling gap measured by scanning tunneling spectroscopy were used to distinguish and visualize these domains.Comment: 4 pages, pdf onl

Topics: Condensed Matter - Strongly Correlated Electrons, Condensed Matter - Materials Science
Publisher: 'American Physical Society (APS)'
Year: 2002
DOI identifier: 10.1103/PhysRevLett.89.237203
OAI identifier: oai:arXiv.org:cond-mat/0212144

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