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.

Structural and optical properties of the Ge(111)-(2 x 1) surface / M. Rohlfing, M. Palummo, G. Onida, R. Del Sole. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 85:25(2000), pp. 5440-5443.

Structural and optical properties of the Ge(111)-(2 x 1) surface

G. Onida
Penultimo
;
2000

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.
Settore FIS/03 - Fisica della Materia
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/2434/192162
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