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Imaging of Polarons in Ferromagnetic Bilayered Manganites by Scanning Tunnelling Microscopy

  • Silvia De Santis
  • Benjamin Bryant
  • Marc Warner
  • Hai Wang
  • Tsuyoshi Kimura
  • Yoshinori Tokura
  • Christoph Renner
  • Antonio Bianconi
  • Gabriel Aeppli
Article

Abstract

We report scanning tunnelling microscopy images of polaronic charge ordered patch on the layered ferromagnet La2−2x Sr1+2x Mn2O7, x=0.32. The spectroscopic investigation shows that the material is gapped above and below the critical temperature, where the gap changes from 500 to 800 mV, giving evidence for polaronic transport behaviour.

Keywords

Polarons Scanning tunnelling microscopy Nanoscale charge ordering Manganites 

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Copyright information

© Springer Science+Business Media, LLC 2007

Authors and Affiliations

  • Silvia De Santis
    • 1
    • 2
  • Benjamin Bryant
    • 1
  • Marc Warner
    • 1
  • Hai Wang
    • 1
  • Tsuyoshi Kimura
    • 4
  • Yoshinori Tokura
    • 5
    • 6
  • Christoph Renner
    • 1
    • 3
  • Antonio Bianconi
    • 2
  • Gabriel Aeppli
    • 1
  1. 1.London Centre for NanotechnologyUniversity College LondonLondonUK
  2. 2.Department of PhysicsUniversity of Rome La SapienzaRomeItaly
  3. 3.Department of Condensed Matter PhysicsUniversity of GenevaGeneva 4Switzerland
  4. 4.Bell LaboratoriesLucent TechnologiesMurray HillUSA
  5. 5.Department of Applied PhysicsUniversity of TokyoBunkyo-ku, Tokyo 113-8656Japan
  6. 6.Spin Superstructure Project (SSS), ERATO, Japan Science and Technology Agency (JST)Tsukuba 305-0046Japan

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