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Vibrational Localization and Vibrational Spectra in Amorphous Silicon

  • R. Biswas (a1), A. M. Bouchard (a1) (a2), W. A. Kamitakahara (a2), G. S. Grest (a3) and C. M. Soukoulis (a1) (a2)...

Abstract

Amorphous silicon structures have been generated by quenching liquid silicon configurations using molecular-dynamics simulations. Localized vibrational modes have been identified in these models. The presence of under-coordinated atoms in these a-Si models leads to extra resonant modes at low frequencies. The vibrational densities of states, and dynamic structure factors for localized, resonant and extended modes, are discussed and compared with neutron scattering data. The amorphous networks have also been adapted to model amorphous silicon-germanium systems. Densities of states and localization characteristics have been calculated for a-SixGe1-x alloys and a-Si/a-Ge superlattices, and are compared to Raman measurements.

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1. Kamitakahara, W. A., Soukoulis, C. M., Shanks, H. R., Buchenau, U., and Grest, G. S., Phys Rev. B 36, 6539 (1987).
2. Biswas, R., Grest, G. S., and Soukoulis, C. M., Phys. Rev. B 36, 7437 (1987).
3. Biswas, R. and Hamann, D. R., Phys. Rev. B 36, 6434 (1987); Phys. Rev. Lett. 55, 2001 (1985).
4. Ding, K. and Andersen, H. C., Phys. Rev. B 34, 6987 (1986).
5. Wooten, F., Winer, K., and Weaire, D., Phys. Rev. Lett. 54, 1392 (1985).
6. Winer, K., Phys. Rev. B 35, 2366 (1987).
7. Luedtke, W. D. and Lan-dman, U., Phys. Rev. B 37, 4656 (1988).
8. Kluge, M. D., Ray, J. R., Rahman, A., Phys. Rev. B 36, 4234 (1987).
9. Stillinger, F. and Weber, T., Phys. Rev. B 31, 5263 (1985).
10. Kelieres, P. and Tersoff, J., Phys. Rev. Lett. 61, 562 (1988).
11. Tersoff, J., Phys. Rev. Lett. 56, 632 (1986); Phys. Rev B 37, 6991 (1988).
12. Pantelides, S., Phys. Rev. Lett. 57, 2979 (1986); ibid. 58, 1344 (1987).
13. Keating, P. N., Phys. Rev. 145, 637 (1966).
14. Biswas, R., Bouchard, A. M., Kamitakahara, W., Soukoulis, C. M. and Grest, G. S., Phys. Rev. Lett. 60, 2280 (1988)
15. Dean, P., Rev. Mod. Phys. 44, 127 (1972). R. J. Bell, Rep. Prog. Phys. 35, 1315 (1972).
16. Bouchard, A. M., Biswas, R., Kamitakahara, W., Soukoulis, C. M. and Prest, G. S., Phys. Rev. B 38, xxx (Nov 15, 1988).
17. Lannin, J. S., in Amorphous and Liquid Semiconductors (Taylor and Francis, London, 1974), p. 1245.
18. Persans, P. D., Ruppert, A. F., Abeles, B., Tiedje, T., Stasiewski, H., Phys. Rev. B 32, 5558 (1985); J. Phys. (Paris) Colloq. 8, 597 (19850).

Vibrational Localization and Vibrational Spectra in Amorphous Silicon

  • R. Biswas (a1), A. M. Bouchard (a1) (a2), W. A. Kamitakahara (a2), G. S. Grest (a3) and C. M. Soukoulis (a1) (a2)...

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