Optical interband transitions in Zn2TiO4 single crystals

Authors

  • Liang Li,

    1. State Key Laboratory of Superhard Materials, Jilin University, Changchun 130012, P.R. China
    2. College of Physics, Jilin University, Changchun 130000, P.R. China
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  • Fangfei Li,

    1. State Key Laboratory of Superhard Materials, Jilin University, Changchun 130012, P.R. China
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  • Tian Cui,

    1. State Key Laboratory of Superhard Materials, Jilin University, Changchun 130012, P.R. China
    2. College of Physics, Jilin University, Changchun 130000, P.R. China
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  • Qiang Zhou,

    1. State Key Laboratory of Superhard Materials, Jilin University, Changchun 130012, P.R. China
    2. College of Physics, Jilin University, Changchun 130000, P.R. China
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  • Dapeng Xu

    Corresponding author
    1. State Key Laboratory of Superhard Materials, Jilin University, Changchun 130012, P.R. China
    2. College of Physics, Jilin University, Changchun 130000, P.R. China
    • Phone: +86 431 85167955, Fax: +86 431 85167046
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Abstract

A high-quality Zn2TiO4 crystal was used as a prototype for determination of the optical interband transitions by measuring the absorption spectrum of the crystal along the a-axes at room temperature in the range of 200–1000 nm. Based on the theory of band-to-band transitions, the indirect energy gap and the phonon energy were determined as Egi = 3.29 eV and Ep = 0.09 eV, respectively. Also, this phonon was just the vibrational mode at 721 cm−1 in the Raman spectra, which participated in the indirect transitions of the Zn2TiO4.

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