X-ray-induced conductivity in iron-doped lithium niobate crystals
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Illumination of photorefractive, iron-doped lithium niobate crystals (LiNbO 3:Fe) with x-rays generates a conductivity that we determine from the speed of hologram erasure. The doping levels of the crystals and the acceleration voltage of our x-ray tube are varied. A theoretical model is presented, which describes the obtained results. A decrease of the conductivity with increasing Fe 2+ concentration can be explained by assuming that holes are the dominant charge carriers for this short-wavelength illumination.
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Physical Review B - Condensed Matter and Materials Physics, v. 68, n. 3, p. 351201-351204, 2003.
