Galinetto, P. and Rossella, F. and Samoggia, G. and Trepakov, V. and Kotomin, E. and Heifets, E. and Markovin, P. and Jastrabik, L. (2006) Structural Phase Transition and Photo-Charge Carrier Transport in SrTiO_3. Ferroelectrics, 337 . pp. 179-188. ISSN 0015-0193 http://resolver.caltech.edu/CaltechAUTHORS:20110425-153232044
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Abstract
The effect of the antiferrodistorsive phase transition observed at ~ 105 K on the photo-carriers transport and band structure of nominally pure SrTiO_3 single crystals was investigated. Simultaneously the ab-initio analysis based on the DFT-HF hybrid approach was performed in order to elucidate the atomic and electronic structure changes. It was found that the structural transition play a minor role in photo-charge transport. However, in highly resistive specimens at low UV-light intensities or under visible-light, 514 nm excitation, weak photoconductivity features are observed in the transition region. Besides, in this region the temperature maximum was found for the photoconductivity spectra. Experimental results are discussed and agree well with theoretical predictions.
| Item Type: | Article | ||||||
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| Additional Information: | © 2006 Taylor and Francis. Paper originally presented at IMF-II, Iguassu Falls, Brazil, September 5-9, 2005; received for publication January 26, 2006. This work was supported by Project 1QS100100563 of the AS CR, the Program of the Presidium RAS "Low dimensional quantum structures" and by Italian Grant FIRB RBNE01KZ94. | ||||||
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| Subject Keywords: | SrTi03; phototransport properties; quantum paraelectrics | ||||||
| Record Number: | CaltechAUTHORS:20110425-153232044 | ||||||
| Persistent URL: | http://resolver.caltech.edu/CaltechAUTHORS:20110425-153232044 | ||||||
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| Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. | ||||||
| ID Code: | 23456 | ||||||
| Collection: | CaltechAUTHORS | ||||||
| Deposited By: | Jason Perez | ||||||
| Deposited On: | 27 Apr 2011 18:18 | ||||||
| Last Modified: | 27 Apr 2011 18:18 |
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