Structure of Si(111)-In Nanowires Determined from the Midinfrared Optical Response
MC GILP, JOHN FINLAY
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Citation:S. Chandola, K. Hinrichs, M. Gensch, N. Esser, S. Wippermann, W. G. Schmidt, F. Bechstedt, K. Fleischer, and J. F. McGilp, Structure of Si(111)-In Nanowires Determined from the Midinfrared Optical Response, Physical Review Letters, 102, 2009, 226805/1 - 226805/4
The anisotropic optical response of Si(111)-(4?1)/(8?2)-In in the midinfrared, where ab initio studies predict significant changes in the band structure between competing models of this important quasi-1D system, has been measured using infrared spectroscopic ellipsometry (IRSE) and reflection anisotropy spectroscopy (RAS). Both IRSE and RAS of the (8?2) phase show that the anisotropic Drude tail of the (4?1) phase is replaced by two peaks at 0.50 and 0.72 eV, which appear in ab initio optical response calculations for the hexagon model of the (8?2) structure, but not the trimer model.
Science Foundation Ireland
Publisher:American Institute of Physics
Series/Report no:Physical Review Letters;