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Evidence of isoelectronic traps in molecular beam epitaxy grown Temperature- and pressure-dependent photoluminescence studies
1.A. Waag, Th. Litz, F. Fischer, H.-J. Lugauer, T. Baron, K. Schüll, U. Zehnder, T. Gerhard, U. Lunz, M. Keim, G. Reuscher, and G. Landwehr, J. Cryst. Growth 184/185, 1 (1998).
2.C. Verie, J. Cryst. Growth 184/185, 1061 (1998).
3.K. Maruyama, K. Suto, and J.-i. Nishizawa, J. Cryst. Growth 214/215, 104 (2000).
4.P. J. Dean and D.C. Herbert, in Bound Excitons in Semiconductors in Excitons, Topics in Current Physics Vol. 14, edited by K. Cho (Springer, Berlin, p. 55, 1979).
5.R. J. Nelson, N. Holonyak, Jr., and W. O. Groves, Phys. Rev. B 13, 5415 (1976).
6.L. Bellaiche and D. Vanderbilt, Phys. Rev. B 61, 7877 (1000).
7.J. E. Bernard and A. Zunger, Phys. Rev. B 36, 3199 (1987).
8.L. Bellaiche, S.-H. Wei, and A. Zunger, Appl. Phys. Lett. 70, 3558 (1997).
9.S. H. Wei, S. B. Zhang, and A. Zunger, J. Appl. Phys. 87, 1304 (2000).
10.D. G. Thomas, J. J. Hopfield, and C. J. Frosch, Phys. Rev. Lett. 15, 857 (1965).
11.J. J. Hopfield, D. G. Thomas, and R. T. Lynch, Phys. Rev. Lett. 17, 312 (1966).
12.W. Allen, J. Phys. C 4, 1936 (1971).
13.S. G. Bishop, B. V. Shanabrook, P. B. Klein, and R. L. Henry, Phys. Rev. B 38, 8469 (1988).
14.S. Kim, I. Herman, K. L. Moore, D. G. Hall, and J. Bevk, Phys. Rev. B 53, 4434 (1996).
15.M. J. Seong, I. Miotkowski, and A. K. Ramdas, Phys. Rev. B 58, 7734 (1998).
16.M. J. Seong, I. Miotkowski, and A. K. Ramdas, Phys. Rev. B 59, 12911 (1999).
17.We believe that it is of importance to distinguish between systems where isoelectronic substitutuents form discrete levels and where they form an “alloy” system with a continuous change in band gap. Since ZnBeSe seems to form a continuous alloy system [see, e.g., C. Chauvet, E. Tournié, and J. P. Faurie, J. Cryst. Growth 214/215, 95 (2000)] we suggest that a single Be atom cannot bind to an exciton.
18.S. P. Guo, Y. Luo, W. Lin, O. Maksimov, M. C. Tamargo, I. Kuskovsky, C. Tian, and G. F. Neumark, J. Cryst. Growth 208, 205 (2000).
19.I. Kuskovsky, C. Tian, G. F. Neumark, S. P. Guo, and M. C. Tamargo, J. Cryst. Growth 214/215, 1058 (2000).
20.J. Gutowski, N. Pesser, and G. Kudlek, Phys. Status Solidi A 120, 11 (1990).
21.We also performed optically detected magnetic resonant measurements on these samples. However, only a very minimal signal was observed, from which we concluded that the PL decay is too fast for convincing results. This, however, also supports our conclusions about an excitonic nature of the dominant PL.
22.B. K. Ridley, Quantum Processes in Semiconductor (Clarendon, Oxford, 1982).
23.Y. P. Varshini, Physica 34, 149 (1967).
24.Y. Shirakawa and H. Kukimoto, J. Appl. Phys. 51, 2014 (1980).
25.K. A. Bowers, Z. Yu, K. J. Gossett, J. W. Cook, Jr., and J. F. Schetzina, J. Electron. Mater. 23, 251 (1994).
26.In an effective mass approximation all relevant states are formed from the band wave functions and, correspondingly, all energy levels ”follow” the edge with temperature and pressure.
27.J. A. Tuchman, S. Kim, Z. Sui, and I. P. Herman, Phys. Rev. B 46, 13371 (1992).
28.M. Ming Li, D. J. Strachan, Tim. Ritter, M. Tamargo, and B. A. Weinstein, Phys. Rev. B 50, 4385 (1994).
29.We use the word “deep” in this letter to underline the relatively large binding energy of this exciton. Although, it is important to understand that often deep impurities do not necessarily mean defects that have energy levels deep into the band gap. For example, P. Y. Yu and M. Cordona, [Fundamentals of Semiconductors (Springer-Berlin, 1996), p. 149] defined deep centers as localized defects, whose energies cannot be calculated by means of an effective mass approximation. We wish to point out that in the present instance, we have the opposite situation, i.e., an exciton which is relatively deep in the gap, but does have effective mass character.
30.S. H. Sohn and Y. Hamakawa, Phys. Rev. B 46, 9452 (1992).
31.It is puzzling why no LO phonon is observed. However, it may well be that we are dealing here with localized modes instead; such modes would be expected since Be is lighter than Zn. At this time, we have no alternative explanation for the absence of the “LO” replica.
32.C. F. Klingshirn, Semiconductor Optics (Springer, New York, 1997).
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