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Superficies y vacío
versión impresa ISSN 1665-3521
Superf. vacío vol.21 no.2 Ciudad de México jun. 2008
Determination of the optical energy gap of Ge1xSnx alloys at 4K
H. Pérez Ladrón de Guevara1, A. G. Rodríguez2, H. NavarroContreras2, and M. A. Vidal2
Universidad de GuadalajaraCentro Universitario de los Lagos Enrique Díaz de León s/n col. Paseo de la Montaña, Lagos de Moreno, Jal. 47460.
Instituto de Investigación en Comunicación Óptica (IICO), Universidad Autónoma de San Luís Potosí Álvaro Obregón 64, San Luís Potosí, S.L.P. 78000
Recibido: 15 de diciembre de 2007.
Aceptado: 9 de abril de 2008.
Abstract
The optical energy gap of Ge1xSnx alloys (x < 0.14) has been determined from transmittance measurements at 4K using a FastFourierTransform Infrared Interferometer (FFTIR) attached to a helium refrigerator. Our results show that the energy gap changes due to the Sn concentration of the alloys. We also show that low temperature increases the energy gap transitions for alloys with low Sn concentrations. By increasing gradually the Sn concentration in alloys the energy gaps decreases, but for x>0.13 alloys, direct energy gap transitions are lower than energy gap obtained at room temperature. These results are according to the theory predicted results at low temperatures.
Keywords: Sputtering; FFTIR; HRXRD.
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References
[1] D. W. Jenkins and J. D. Dow, Phys. Rev. B 36, 7994 (1987). [ Links ]
[2] K. A. Mäder and A. Baldereschi, Solid State Commun. 69, 1123 (1989). [ Links ]
[3] G. He and H. A. Atwater, Appl. Phys. Lett. 79, 1937 (1997). [ Links ]
[4] S. Oguz and William Paul, Appl. Phys. Lett. 43, 848 (1983). [ Links ]
[5] O. Gurdal, M. A. Hasan, M. R. Sardela, Jr. and J. E. Greene, Appl. Phys. Lett. 67, 956, (1995). [ Links ]
[6] Gang He and Harry A. Atwater, Appl. Phys. Lett. 68, 664, (1996). [ Links ]
[7] O. Gurdal, P. Desjardins, J. R. Carlsson and J. E. Greene, J. Appl. Phys. 83, 162, (1998). [ Links ]
[8] M. R. Bauer, J. Tolle, Corey Bungay, Solid State Comm. 127, 355 (2003). [ Links ]
[9] Bauer, J. Taraci, J. Tolle, A. V. G. Chizmeshya, S. Zollner, D. J. Smith, J. Menendez, Changwu Hu, and J. Kouvetakis, Appl. Phys. Lett. 81, 2992 (2002). [ Links ]
[10] Matthew Bauer, Cole Ritter, P. A. Crozier, Jie Ren, J. Menendez, G. Wolf, and J. Kouvetakis, App. Phys. Lett, 83, 2163 (2003). [ Links ]
[11] P. Aella, C. Cook, J Tolle, S. Zollner, A. V.G. Chizmeshya, and J. Kouvetakis, Appl. Phys. Lett. 84, 888 (2004). [ Links ]
[12] R. Rocucka, J. Tolle, C. cook, A. V. G. Chizmeshya, J. Kouvetakis, V. D'Costa, J. Menendez, Zhihao D. Chen, S. Zollner. Appl. Phys. Lett. 86, 191912 (2005). [ Links ]
[13] J. Tolle, R. Roucka, A. V. G. Chizmeshya, J. Kouvestakis, V. R. D'Costa and J. Menendez, Appl. Phys. Lett. 88, 252112 (2006). [ Links ]
[14] S.I. Shah and J. E. Greene, J. Crystal Growth 83, 3, (1987). [ Links ]
[15] H. Pérez Ladrón de Guevara, A.G. Rodríguez, H. NavarroContreras, and M. A. Vidal, Appl. Phys. Lett. 83, 4942, (2003). [ Links ]
[16] R. Ragan and H. A. Atwater, Appl. Phys. Lett. 77, 3418, (2000). [ Links ]
[17] R. Ragan and H. A. Atwater, Matter. Res. Soc. Symp. Proc. 588, 199 (1999). [ Links ]
[18] H. Pérez Ladrón de Guevara, A.G. Rodríguez, H. NavarroContreras, and M. A. Vidal, Appl. Phys. Lett. 84, 4532, (2004). [ Links ]
[19] V. R. D'Costa, C. S. Cook, A. G. Birdwell, C. L. Littler. M. Canonico, S. Zollner, J. Kouvetakis, and J. Menéndez, Phys. Rev. B 73, 125207 (2006). [ Links ]
[20] X. J. Zhand, G. Xue, A. Agarwal, R. Tsu, M. A. Hassan, J. E. Greene, and A. Rockett, J. Vac. Sci. Technol. A, 11, 2553, (1993). [ Links ]