期刊
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE
卷 211, 期 1, 页码 82-86出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/pssa.201330147
关键词
band structure; effective masses; ellipsometry; phonon-plasmon coupling; SnO2
资金
- Deutsche Forschungsgemeinschaft [INST 272/211-1]
- National Science Foundation NSF MWN Program [DMR09-09203]
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [0909203] Funding Source: National Science Foundation
Generalized infrared spectroscopic ellipsometry (GIRSE) was applied to Sb-doped rutile SnO2(101) films grown by plasma-assisted molecular beam epitaxy (PAMBE). Coupled longitudinal-optical (LO) phonon-plasmon (LPP) modes for the two principal polarization directions of the optically anisotropic SnO2 were identified and their frequencies were determined as a function of electron concentrations obtained by Hall effect measurements. The analysis of these modes yielded very accurate values for the plasma frequencies and finally the anisotropy of the electron effective masses as a function of carrier density. Comparison to Hall effect electron concentrations yielded a non-parabolicity of the conduction band. (C) 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
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