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Fundamental Absorption of Barium Oxide from Its Reflectivity Spectrum
Abstract
The reflectivity spectrum of single crystals of barium oxide, cleaved in vacuum, was measured as a function of temperature. The Kramers-Kronig integral relation was applied to derive the spectral dependence of both the absorption constant and index of refraction in the fundamental absorption region. The absorption compares favorably with results of previous thin-film transmission measurements and confirms the intrinsic nature of the multiple structure, recently explained by Overhauser as resulting from spin-orbit interaction in exciton creation. Large time-dependent changes of the reflectivity spectrum were observed even in a vacuum of ${10}^{\ensuremath{-}7}$ mm Hg at liquid-nitrogen temperature and are interpreted as interference effects from a growing surface layer of Ba(O${\mathrm{H})}_{2}$, formed with a diffusion-limited rate of growth.
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Citations
Cited by
Semiconducting and other major properties of gallium arsenide
Blakemore, J. S. (1982) · Journal of Applied Physics · doi:10.1063/1.331665 · Cited by 2,503
The exciton spectrum of zinc oxide
Thomas, D. G. (1960) · Journal of Physics and Chemistry of Solids · doi:10.1016/0022-3697(60)90104-9 · Cited by 803
Kramers-Kronig analysis of reflection data
Roessler, D. M. (1965) · British Journal of Applied Physics · doi:10.1088/0508-3443/16/8/310 · Cited by 264
Tanner, D. B. (2019) · doi:10.1017/9781316672778 · Cited by 106
Metadata
- Authors
- Jahoda, F. C.
- Venue
- Physical Review
- Publisher
- American Physical Society (APS)
- Published
- 1957-09-01
- Volume
- 107
- Issue
- 5
- Pages
- 1261-1265
- ISSN
- 0031-899X (ISSN-L)
- OpenAlex
- W2085714099
- Cited by
- 191
- References
- 0
- FWCI
- 8.38
- Type
- journal article
- Language
- en
- Open access
- closed
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