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Optically stimulated depolarization currents in Ca(NbO3)2 crystals

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Zeitschrift für Physik B Condensed Matter

Abstract

In Ca(NbO3)2 crystals a depolarization current is obtained in short-circuit measurements by light irradiation at 90 K after application of an external electrical field at cooling down. The spectral response of this current shows a broad band over the whole visible wavelength range. The position and height of the current maximum depend on the amount and direction of the spectral scanning speed. Since the short-circuit current is assumed to be associated with the rate of heterocharge neutralization by the drift of photo-excited carriers these phenomena are discussed in the model of persistent internal polarization rather than in that of moving zero-field plane. The results of calculation show good agreement with the experimental data.

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Authors and Affiliations

  1. I. Physikalisches Institut, Universität Gießen, Heinrich-Buff-Ring 16, D-6300, Gießen, Federal Republic of Germany

    M. Böhm & A. Scharmann

Authors
  1. M. Böhm
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  2. A. Scharmann
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Dedicated to Prof. Dr. E. Saur, on the occasion of his 65th birthday.

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Böhm, M., Scharmann, A. Optically stimulated depolarization currents in Ca(NbO3)2 crystals. Z Physik B 22, 313–317 (1975). https://doi.org/10.1007/BF01312800

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  • DOI: https://doi.org/10.1007/BF01312800

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