d-orbital symmetry of BaTiO3 thin film

POSTER

Abstract

A high-quality BaTiO3 thin film was grown on a DyScO3 single crystal substrate using pulsed laser deposition. Soft X-ray absorption spectroscopy was performed at the Ti L2,3 edges of the film to characterize the d-orbital symmetry. Novel split Ti d-orbital eg and degenerate t2g subbands of the BTO film have been observed. The energy of dx2-y2 orbital is lower than the d3z2-r2 orbital by about 100 meV, the opposite of what would normally be expected for Jahn-Teller octahedral distortion. This is likely a result of the displaced Ti cation. This novel d-orbital symmetry is very likely to be found in other perovskite-based ferroelectric materials.

Presenters

  • Yang Song

    Key Laboratory of Magnetic Materials and Devices, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences

Authors

  • Yang Song

    Key Laboratory of Magnetic Materials and Devices, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences

  • Ruyi Zhang

    Key Laboratory of Magnetic Materials and Devices, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Key Laboratory of Magnetic Materials and Devices, Ningbo Institute of Industrial Technology, Chinese Academy of Sciences.

  • Yanwei Cao

    Key Laboratory of Magnetic Materials and Devices, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Key Laboratory of Magnetic Materials and Devices, Ningbo Institute of Industrial Technology, Chinese Academy of Sciences., Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Chinese Academy of Science