Paul Kent Publications

Structure of YSi2 nanowires from scanning tunneling spectroscopy and first-principles

Applied Physics Letters 95 123107 (2009)

Exceptionally long and uniform YSi2 nanowires are formed via self-assembly on Si(001). The in-plane width of the thinnest wires is known to be quantized in odd multiples of the silicon lattice constant. Here, we identify a class of nanowires that violates the ”odd-multiple” rule. The structure of the thinnest wire in this category is determined by comparing scanning tunneling spectroscopy measurements with the calculated surface density of states of candidate models by means of Pendry R-factor analysis. The relative stability of the odd and even wire systems is analyzed via first-principles calculations.

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