Egorova, S. G. and Chernichkin, V. I. and Ryabova, L. I. and Danilov, S. N. and Nicorici, A. V. and Khokhlov, D. R. (2014) Probing of local electron states by laser terahertz radiation in PbTe(Ga). JOURNAL OF ALLOYS AND COMPOUNDS, 615. pp. 375-377. ISSN 0925-8388, 1873-4669
Full text not available from this repository. (Request a copy)Abstract
We report on unusual photoconductivity under the action of strong terahertz laser pulses in PbTe(Ga) single crystals at low temperatures. The character and even the sign on the photosignal depends on the level of photoexcitation: the photoconductivity is positive and persistent at high degrees of excitation, whereas it is negative and non-persistent at low levels of excitation. We show that this non-trivial photoelectric behaviour is due to formation of local electron states in the close vicinity of the quasi-Fermi level. These local states may be formed only when the quasi-Fermi level lies on the background of an allowed energy band with a relatively high density of states. (C) 2014 Elsevier B.V. All rights reserved.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | IMPURITY STATES; DEEP IMPURITIES; SEMICONDUCTORS; SPECTROSCOPY; PHOTOCONDUCTIVITY; IONIZATION; Gallium-doped lead telluride; Local electron states; Terahertz photoconductivity |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Experimental and Applied Physics > Professor Ganichev > Group Sergey Ganichev |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 05 Aug 2019 13:52 |
| Last Modified: | 05 Aug 2019 13:52 |
| URI: | https://pred.uni-regensburg.de/id/eprint/9075 |
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