Atomic resolution STM study of Perovskite Manganite Thin Films

ORAL

Abstract

The perovskite manganites have attracted huge interest due to their intriguing electronic inhomogeneous nature which is believed to be responsible for colossal magnetoresistance. Scanning tunneling microscope (STM) is one of the most promising techniques for studying such electronic inhomogeneity in real space. In order to investigate electronic property at the surface of non-layered perovskite manganite, we have synthesized single crystal La5/8Ca3/8MnO3 (LCMO) thin film by laser MBE technique. In-situ thin film growth enables us to obtain atomically resolved STM image which has c-2x2 superlattice unit cell. In this talk, we will discuss the electronic properties as well as lattice structures of the LCMO surfaces. This research is sponsored by the Laboratory Directed Research and Development Program of Oak Ridge National Laboratory (ORNL), managed by UT-Battelle, LLC for the US Department of Energy under Contract No. DEAC05-00OR22725.

–

Authors

  • Kenji Fuchigami

    University of Tennessee, ORNL and IHI Co. Ltd., Japan

  • Zheng Gai

    ORNL

  • T.Z. Ward

    University of Tennessee and ORNL, University of Tennessee and Oak Ridge National Laboratory

  • Lifeng Yin

    ORNL, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA

  • Ward Plummer

    Univ. of Tennessee, Knoxville, TN 37996 and Materials Science and Technology Division, ORNL, Oak Ridge, TN 37831, Oak Ridge National Lab, Oak Ridge, TN 37831 and Univ of Tennessee, Knoxville, TN 37996, University of Tennessee, Knoxville, University of Tennessee, Knoxville, TN 37996, University of Tennessee and ORNL, University of Tennessee

  • Jian Shen

    ORNL and University of Tennessee, Oak Ridge National Laboratory, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA