Journal
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE
Volume 209, Issue 12, Pages 2596-2599Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/pssa.201228394
Keywords
optical interband transitions; phonons; Raman spectra; single crystals; Zn2TiO4
Funding
- National Found for Fostering Talents of basic Science [J0730311]
- National Basic Research Program of China [2011CB808200]
- Program for Changjiang Scholars and Innovative Research Team in University [IRT1132]
- National Natural Science Foundation of China [51032001, 11074090, 10979001, 51025206]
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A high-quality Zn2TiO4 crystal was used as a prototype for determination of the optical interband transitions by measuring the absorption spectrum of the crystal along the a-axes at room temperature in the range of 200-1000 nm. Based on the theory of band-to-band transitions, the indirect energy gap and the phonon energy were determined as E-gi = 3.29 eV and E-p = 0.09 eV, respectively. Also, this phonon was just the vibrational mode at 721 cm(-1) in the Raman spectra, which participated in the indirect transitions of the Zn2TiO4. (C) 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
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