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Microscopic Theory of Second Harmonic Generation at the Si(100) 2 × 1 Surface

✍ Scribed by Mendoza, B.S. ;Mendoza, B.S. ;Gaggiotti, A. ;Del Sole, R.

Publisher: John Wiley and Sons
Year: 1998
Tongue: English
Weight: 148 KB
Volume: 170
Category: Article
ISSN: 0031-8965
DOI: 10.1002/(sici)1521-396x(199812)170:2<343::aid-pssa343>3.0.co;2-z

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✦ Synopsis

We apply a microscopic formulation to calculate the second harmonic spectra of Si(100) 2 Â 1. We compare the calculated second harmonic radiated efficiency for several 2 Â 1 reconstructions, with different dimer bucklings, with each other. Besides the surface-allowed E 1 , E 2 andE H 1 resonances, other resonances at lower energies are found and explained in terms of transitions across surface states. We find that the spectra are dominated by the c s jjjjc component of the second-order surface susceptibility.

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