We study the two lowest-energy isomers of the Ge(111)-(2 X 1) surface, by a state-of-the-art first-principles calculation of their optical spectra, including the electron-hole interaction effectsl A comparison of our results with the available experimental data suggests that, at difference with the silicon case, the stablest isomer differs from the standard "buckled Pandey chains" reconstruction. This conclusion is supported by accurate total-energy results.
Rohlfing, M., Palummo, M., Onida, G., Del Sole, R. (2000). Structural and optical properties of the Ge(111)-(2 x 1) surface. PHYSICAL REVIEW LETTERS, 85(25), 5440-5443.
Structural and optical properties of the Ge(111)-(2 x 1) surface
PALUMMO, MAURIZIA;
2000-01-01
Abstract
We study the two lowest-energy isomers of the Ge(111)-(2 X 1) surface, by a state-of-the-art first-principles calculation of their optical spectra, including the electron-hole interaction effectsl A comparison of our results with the available experimental data suggests that, at difference with the silicon case, the stablest isomer differs from the standard "buckled Pandey chains" reconstruction. This conclusion is supported by accurate total-energy results.File in questo prodotto:
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