ISSN:
1434-6036
Keywords:
PACS. 78.40.Fy Semiconductors - 78.20.Ci Optical constants (including refractive index, complex dielectric constant, absorption, reflection and transmission coefficients, emissivity) - 71.20.Nr Semiconductor compounds
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract: The dielectric function of ZnSe has been deduced from ellipsometric measurements between 20 K and 380 K. is analysed around each critical point with the standard critical point model. The variations of the different parameters characterising each transition with temperature are presented and analysed. The temperature coefficients of the energies of the critical transitions are given. is essentially governed by the Coulomb interaction near the fundamental gap. Thanks to the high binding energy of the exciton and the low spectral width of the ellipsometer, the fundamental state of the exciton is found completely separated from the first excited states and the continuum at low temperature. In return the strong transition E1 near the L points of the Brillouin zone can be described equally well with a 2D or an excitonic transition.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/s100510050054
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