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  • 76.30.Da  (1)
  • Anderson localization  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Light-induced charge transport in BaTiO3 via three charge states of rhodium (1995)
    Springer
    Applied physics 61 (1995), S. 1-7 
    Details
    ISSN: 1432-0649
    Keywords: 71.55 ; 76.30.Da ; 78.50
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract By combined studies of electron spin resonance and optical absorption at low temperatures, the charge-transfer bands of Rh5+ and Rh4+ are identified to be peaked near 1.6 and 1.9 eV, respectively. On this basis, the light-induced charge-transfer processes in BaTiO3:Rh are unraveled at room temperature. It is shown that three charge states of Rh are involved, leading to two levels: the shallow Rh4+/5+ and the deeper Rh3+/4+ level. The optical behaviour of these two levels corresponds to those expected from a ‘two-center’ model. The present paper represents the first atomic-scale identification of three charge states of one element leading to optical ‘two-level’ response.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01090965
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  • 2
    Electronic Resource
    Electronic Resource
    Ti3+ Jahn–Teller Polarons and Bipolarons in BaTiO3 (1999)
    Springer
    Journal of superconductivity 12 (1999), S. 193-195 
    Details
    ISSN: 1572-9605
    Keywords: Jahn–Teller effect ; polaron ; Anderson localization
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Physics
    Notes: Abstract In high quality BaTiO3 crystals without trapping defects conduction electrons form Ti3+ polarons, their stabilization energy being caused by a Jahn–Teller effect. Depending on locally fluctuating potentials, tunable by uniaxial stress, small, intermediate, and banding electrons are identified by EPR. There are indications that also bipolarons are present.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1007731316635
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