Journal article
Persistent photoconductivity in strontium titanate
Physical review letters, Vol.111(18), pp.187403-187403
11/01/2013
Handle:
https://hdl.handle.net/2376/111973
PMID: 24237562
Abstract
Persistent photoconductivity was observed in strontium titanate (SrTiO(3)) single crystals. When exposed to sub-bandgap light (2.9 eV or higher) at room temperature, the free-electron concentration increases by over 2 orders of magnitude. After the light is turned off, the enhanced conductivity persists for several days, with negligible decay. From positron lifetime measurements, the persistent photoconductivity is attributed to the excitation of an electron from a titanium vacancy defect into the conduction band, with a very low recapture rate.
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Details
- Title
- Persistent photoconductivity in strontium titanate
- Creators
- Marianne C Tarun - Department of Physics and Astronomy, Washington State University, Pullman, Washington 99164-2814, USAFarida A SelimMatthew D McCluskey
- Publication Details
- Physical review letters, Vol.111(18), pp.187403-187403
- Academic Unit
- Physics and Astronomy, Department of
- Publisher
- United States
- Identifiers
- 99900547594501842
- Language
- English
- Resource Type
- Journal article