Structure of YSi2 nanowires from scanning tunneling spectroscopy and first principles

V. Iancu; P. R.C. Kent; C. G. Zeng; H. H. Weitering

doi:10.1063/1.3236778

Structure of YSi₂ nanowires from scanning tunneling spectroscopy and first principles

V. Iancu
, P. R.C. Kent
, C. G. Zeng
, H. H. Weitering

Computational Chemistry and Nanomaterial

Research output: Contribution to journal › Article › peer-review

20 Scopus citations

Abstract

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 the Pendry R -factor analysis. The relative stability of the odd and even wire systems is analyzed via first-principles calculations.

Original language	English
Article number	123107
Journal	Applied Physics Letters
Volume	95
Issue number	12
DOIs	https://doi.org/10.1063/1.3236778
State	Published - 2009

Funding

P.R.C.K. thanks Mao-Hua Du for helpful conversations. The experimental research was sponsored by the NIH under Grant No. R01HG002647. The computational research performed by P.R.C.K. used resources of the National Energy Research Scientific Computing Center (contract DE-AC02-05CH11231), National Center for Computational Sciences (DE-AC05-00OR22725), and the Center for Nanophase Materials Sciences, which are all sponsored by the DOE Office of Science.

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AU - Iancu, V.

AU - Kent, P. R.C.

AU - Zeng, C. G.

AU - Weitering, H. H.

PY - 2009

Y1 - 2009

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AB - 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 the Pendry R -factor analysis. The relative stability of the odd and even wire systems is analyzed via first-principles calculations.

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JO - Applied Physics Letters

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ER -

Structure of YSi₂ nanowires from scanning tunneling spectroscopy and first principles

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