Optical deformation potentials for PbSe and PbTe
The values of optical deformation potentials (Du and Dd) for PbSe and PbTe are analyzed using absorption, luminescence and X-ray diffraction data on high quality, deep quantum well PbSe/PbSrSe and PbTe/PbEuTe structures. It is important for these evaluations to use the val...
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| Autores principales: | , , , |
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| Formato: | article |
| Lenguaje: | EN |
| Publicado: |
D.Ghitu Institute of Electronic Engineering and Nanotechnologies
2005
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| Materias: | |
| Acceso en línea: | https://doaj.org/article/09a5628d49414de696aa103f404eab0c |
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| Sumario: | The values of optical deformation potentials (Du and Dd) for PbSe and PbTe are
analyzed using absorption, luminescence and X-ray diffraction data on high quality, deep
quantum well PbSe/PbSrSe and PbTe/PbEuTe structures. It is important for these evaluations
to use the value of isotropic deformation potential (Diso) which is determined from the low
temperature hydrostatic pressure experiments and the intervalley splitting which was
determined from differential absorption spectroscopy. The fitting procedure was done using
an accurate k·p model for the band structure near the fundamental gap including anisotropy,
multi-valley, and band nonparabolicity effects. We find the new optical deformation potential
values at 4 K: Du = - 0.2 and – 0.5 eV, and Dd = 5.3 and 3.5 eV for PbSe and PbTe,
respectively. |
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