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Lines: imaginary part of before (dotted), during (dashed), and after (solid) chemical processing to remove overlayers. Open circles: corresponding data for from Ref. 5 for comparison.
Real (a) and imaginary (b) parts of of for , 0.127, 0.337, 0.491, 0.726, and 1.000. Successive spectra are offset by 10 for clarity. The spectra of the binary end points InAs and InSb were taken from Ref. 4.
Open circles: numerically calculated second energy derivatives of the data of Fig. 2. Lines: best-fit model representations in the (a) and (b) spectral regions.
Energy band-structure of InSb calculated by the LASTO method.
Solid circles: dependences of the CP energies determined from data. Solid lines: best fits of to the CP energies determined from the band-structure calculations. The solid circles and lines therefore directly compare experiment and theory. The dashed line and open diamonds: show analogous data from Ref. 5. For InSb the and CP energies were taken from Refs. 12 and 13, respectively, while , , and for InAs were taken from Ref. 14.
Values of the parameters , , and obtained by least-squares fitting the compositional dependences of the CP energies calculated by the LASTO method to the quadratic .
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