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Author (up) Seiro S. S.; Fasano Y.; Maggio-Aprile I.; Koller E.; Lortz R.; Fischer Ø url  doi
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  Title Fingerprint of dynamical spin-charge correlations in the tunneling spectra of colossal magnetoresistive manganites Type Journal Article
  Year 2009 Publication Physical Review B Abbreviated Journal  
  Volume 80 Issue Pages 100404-100408  
  Keywords  
  Abstract We present temperature-dependent scanning tunneling spectroscopy measurements on La1−xCaxMnO3 (x∼0.33) films with different degrees of biaxial strain. A depletion in normalized conductance around the Fermi level is observed both above and below the insulator-to-metal transition temperature TMI, for weakly as well as highly strained films. This pseudogaplike depletion globally narrows on cooling. The zero-bias conductance decreases on cooling in the insulating phase, reaches a minimum close to TMI and increases on cooling in the metallic phase, following the trend of macroscopic conductivity. These results support a recently proposed scenario in which dynamical short-range antiferromagnetic/charge order correlations play a preeminent role in the transport properties of colossal magnetoresistive manganites [R. Yu et al., Phys. Rev. B 77, 214434 (2008)].  
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  Call Number BT @ yanina.fasano @ Serial 589  
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