期刊
APPLIED PHYSICS LETTERS
卷 97, 期 4, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.3471398
关键词
carrier density; electrical conductivity; lanthanum; Seebeck effect; strontium compounds; superlattices; thermoelectric power; thin films
资金
- U.S. Department of Energy, Basic Energy Sciences [DE-FG02-02ER45994]
- U.S. Department of Energy, Office of Basic Energy Sciences
- U.S. Department of Energy (DOE) [DE-FG02-02ER45994] Funding Source: U.S. Department of Energy (DOE)
Seebeck coefficients and conductivity of La-doped SrTiO3 thin films grown by molecular beam epitaxy were measured as a function of carrier concentration. At low carrier concentrations, thin films show very high Seebeck coefficients (up to 980 mu V K-1). The maximum thermoelectric power factor was 39 mu Wcm(-1) K-2 at a carrier concentration of 7 x 10(20) cm(-3). La-delta-doped superlattices were also characterized and exhibited Seebeck coefficients of similar to 500 mu V K-1. The results are discussed in the context of reports of enhanced Seebeck coefficients in delta-doped SrTiO3 superlattices. (C) 2010 American Institute of Physics. [doi:10.1063/1.3471398]
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