Indirect Optical Absorption of Single Crystalline beta-FeSi2

Details Indirect Optical Absorption of Single Crystalline beta-FeSi2 Indirect Optical Absorption of Single Crystalline beta-FeSi2

2004-05-20

arxiv.org/abs/cond-mat/0405482v1

Physics

Condensed Matter

Materials Science

10 pages with 3 figures

Scientific paper

10.1063/1.1790590

We investigated optical absorption spectra near the fundamental absorption edge of beta-FeSi2 single crystals by transmission measurements. The phonon structure corresponding to the emission and absorption component was clearly observed in the low-temperature absorption spectra. Assuming exciton state in the indirect allowed transition, we determined a phonon energy of 0.031 +- 0.004 eV. A value of 0.814 eV was obtained for the exciton transition energy at 4K.

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