Temperature dependence of a zero bias anomaly in scanning tunnelling spectra of Sr(4)Ru(3)O(10)

ORAL

Abstract

We have studied a zero bias anomaly in scanning tunnelling spectra of layered ruthenate Sr(4)Ru(3)O(10). This material shows a dip-like feature in the dI/dV spectra, which has previously observed in the single-layer Sr(2)RuO(4) and double- layer Sr(3)Ru(2)O(7) ruthenates. We have studied in particular the temperature dependence of the zero bias anomaly, which is in all three materials different. The triple-layer material shows intergrowth of single and double layers, which have been identified by their spectroscopic fingerprint. Finally, we discuss different effects as possible explanations for the zero bias anomaly.

*The work was supported by NSF-DMR0346826 and the Deutsche Forschungsgemeinschaft.

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Authors

  • Bernhard Nansseu

    • University of Kassel

  • Tatjana Novgorodov

    • University of Kassel

  • Michael Waelsch

    • University of Kassel

  • J\"urgen Hager

    • University of Kassel

  • Jiandi Zhang

    • Florida International University, Miami

  • R. Moore

    • Oak Ridge National Laboratory

  • Ward Plummer

    • Oak Ridge National Laboratory

  • Zhiqiang Mao

    • Tulane University

  • Rene Matzdorf

    • University of Kassel