Giant Photo-Induced Dielectricity in SrTiO_3

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Author(s)

Abstract

Dielectric properties are studied in quantum paraelectric SrTiO_3 under UV-light illumination from 100 Hz to 1 MHz at low temperatures. We demonstrate that the complex dielectric constant is strongly enhanced by interband photo-excitation. Dispersion measurements confirm that the photo-induced Debye-type relaxator enhances the dielectric constant. The anomalous temperature and excitation-density dependence of the relaxation time suggests that photo-induced polar domains with finite lifetime lead to the novel dielectric properties.

Journal

  • Journal of the Physical Society of Japan

    Journal of the Physical Society of Japan 72(1), 41-44, 2003-01-15

    The Physical Society of Japan (JPS)

References:  16

Cited by:  2

Codes

  • NII Article ID (NAID)
    110001954210
  • NII NACSIS-CAT ID (NCID)
    AA00704814
  • Text Lang
    ENG
  • Article Type
    Journal Article
  • ISSN
    00319015
  • NDL Article ID
    6407444
  • NDL Source Classification
    ZM35(科学技術--物理学)
  • NDL Call No.
    Z53-A404
  • Data Source
    CJP  CJPref  NDL  NII-ELS 
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