Burstein-Moss shift of n-doped In0.53Ga0.47As/InP
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Abstract
We have evaluated the Burstein-Moss (BM) shift at 300 K in seven samples of n-In0.53Ga0.47As (1.3×1016≤n≤3.9×1019cm-3) lattice matched to InP using spectral ellipsometry in the range of 0.4-5.1 eV. The data have been fitted over the entire spectral range to a model reported by Holden [in Thermphotovoltaic Generation of Electricity, edited by T. J. Coutts, J. P. Brenner, and C. S. Allman, AIP Conf. Proc. No. 460 (AIP, Woodbury, NY, 1999), p. 39], based on the electronic energy-band structure near critical points plus relevant discrete and continuum excitonic effects. A Fermi-level filling factor in the region of the fundamental gap has been used to account for the BM effect. While our data exhibit nonparabolic effects, with a blueshift of 415 meV for the most highly doped sample, we did not observe the Fermi-level saturation at 130 meV for n≥1019cm-3 reported by Tsukernik [Proceedings of the 24th International Conference on the Physics of Semiconductors, Jerusalem, 1998, edited by D. Gershoni (World Scientific, Singapore, 1999)]. Our BM displacements are in agreement with a modified full-potential linearized augmented-plane-wave calculation [G. W. Charache , J. Appl. Phys. 86, 452 (1999)] plus possible band-gap-reduction effects.
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Ga<sub>0.47</sub>
As/InP</title>
<author><name sortKey="Munoz, Martin" uniqKey="Munoz M">Martin Munoz</name>
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<affiliation wicri:level="2"><inist:fA14 i1="03"><s1>Department of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, Minnesota 55455</s1>
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<author><name sortKey="Pollak, Fred H" uniqKey="Pollak F">Fred H. Pollak</name>
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<author><name sortKey="Kahn, Mathias" uniqKey="Kahn M">Mathias Kahn</name>
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<author><name sortKey="Ritter, Dan" uniqKey="Ritter D">Dan Ritter</name>
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<author><name sortKey="Kronik, Leeor" uniqKey="Kronik L">Leeor Kronik</name>
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<author><name sortKey="Cohen, Guy M" uniqKey="Cohen G">Guy M. Cohen</name>
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<front><div type="abstract" xml:lang="en">We have evaluated the Burstein-Moss (BM) shift at 300 K in seven samples of n-In<sub>0.53</sub>
Ga<sub>0.47</sub>
As (1.3×10<sup>16</sup>
≤n≤3.9×10<sup>19</sup>
cm<sup>-3</sup>
) lattice matched to InP using spectral ellipsometry in the range of 0.4-5.1 eV. The data have been fitted over the entire spectral range to a model reported by Holden [in Thermphotovoltaic Generation of Electricity, edited by T. J. Coutts, J. P. Brenner, and C. S. Allman, AIP Conf. Proc. No. 460 (AIP, Woodbury, NY, 1999), p. 39], based on the electronic energy-band structure near critical points plus relevant discrete and continuum excitonic effects. A Fermi-level filling factor in the region of the fundamental gap has been used to account for the BM effect. While our data exhibit nonparabolic effects, with a blueshift of 415 meV for the most highly doped sample, we did not observe the Fermi-level saturation at 130 meV for n≥10<sup>19</sup>
cm<sup>-3</sup>
reported by Tsukernik [Proceedings of the 24th International Conference on the Physics of Semiconductors, Jerusalem, 1998, edited by D. Gershoni (World Scientific, Singapore, 1999)]. Our BM displacements are in agreement with a modified full-potential linearized augmented-plane-wave calculation [G. W. Charache , J. Appl. Phys. 86, 452 (1999)] plus possible band-gap-reduction effects.</div>
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<fC01 i1="01" l="ENG"><s0>We have evaluated the Burstein-Moss (BM) shift at 300 K in seven samples of n-In<sub>0.53</sub>
Ga<sub>0.47</sub>
As (1.3×10<sup>16</sup>
≤n≤3.9×10<sup>19</sup>
cm<sup>-3</sup>
) lattice matched to InP using spectral ellipsometry in the range of 0.4-5.1 eV. The data have been fitted over the entire spectral range to a model reported by Holden [in Thermphotovoltaic Generation of Electricity, edited by T. J. Coutts, J. P. Brenner, and C. S. Allman, AIP Conf. Proc. No. 460 (AIP, Woodbury, NY, 1999), p. 39], based on the electronic energy-band structure near critical points plus relevant discrete and continuum excitonic effects. A Fermi-level filling factor in the region of the fundamental gap has been used to account for the BM effect. While our data exhibit nonparabolic effects, with a blueshift of 415 meV for the most highly doped sample, we did not observe the Fermi-level saturation at 130 meV for n≥10<sup>19</sup>
cm<sup>-3</sup>
reported by Tsukernik [Proceedings of the 24th International Conference on the Physics of Semiconductors, Jerusalem, 1998, edited by D. Gershoni (World Scientific, Singapore, 1999)]. Our BM displacements are in agreement with a modified full-potential linearized augmented-plane-wave calculation [G. W. Charache , J. Appl. Phys. 86, 452 (1999)] plus possible band-gap-reduction effects.</s0>
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