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Band gap reduction in InNxSb1-x alloys : optical absorption, k · P modeling, and density functional theory
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Linhart, W. M., Rajpalke, M. K., Buckeridge, John, Murgatroyd, P. A. E., Bomphrey, John James, Alaria, J., Catlow, C. R. A., Scanlon, D. O., Ashwin, M. J. and Veal, T. D. (Tim D.) (2016) Band gap reduction in InNxSb1-x alloys : optical absorption, k · P modeling, and density functional theory. Applied Physics Letters, 109 (13). 132104. doi:10.1063/1.4963836
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Official URL: http://dx.doi.org/10.1063/1.4963836
Abstract
Using infrared absorption, the room temperature band gap of InSb is found to reduce from 174 (7.1 μm) to 85 meV (14.6 μm) upon incorporation of up to 1.13% N, a reduction of ∼79 meV/%N. The experimentally observed band gap reduction in molecular-beam epitaxial InNSb thin films is reproduced by a five band k ⋅· P band anticrossing model incorporating a nitrogen level, EN, 0.75 eV above the valence band maximum of the host InSb and an interaction coupling matrix element between the host conduction band and the N level of β = 1.80 eV. This observation is consistent with the presented results from hybrid density functional theory.
| Item Type: | Journal Article | ||||||||||
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| Subjects: | Q Science > QC Physics T Technology > TS Manufactures |
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| Divisions: | Faculty of Science > Chemistry Faculty of Science > Physics |
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| Library of Congress Subject Headings (LCSH): | Alloys, Wide gap semiconductors, Conduction band, Nitrogen | ||||||||||
| Journal or Publication Title: | Applied Physics Letters | ||||||||||
| Publisher: | American Institute of Physics | ||||||||||
| ISSN: | 0003-6951 | ||||||||||
| Official Date: | 29 September 2016 | ||||||||||
| Dates: |
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| Volume: | 109 | ||||||||||
| Number: | 13 | ||||||||||
| Article Number: | 132104 | ||||||||||
| DOI: | 10.1063/1.4963836 | ||||||||||
| Status: | Peer Reviewed | ||||||||||
| Publication Status: | Published | ||||||||||
| Access rights to Published version: | Open Access | ||||||||||
| Funder: | Engineering and Physical Sciences Research Council (EPSRC), Narodowe Centrum Nauki (NCN), Innovate UK | ||||||||||
| Grant number: | EP/G004447/2, P/K016288/1, EP/L000202/1 (EPSRC), 014/13/D/ST3/ 01947 (NCN) | ||||||||||
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