Nonlinear current-induced forces in Si atomic wires

Details Nonlinear current-induced forces in Si atomic wires Nonlinear current-induced forces in Si atomic wires

2002-09-06

arxiv.org/abs/cond-mat/0209163v1

PRB 67, 161311(R) (2003)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 figures

Scientific paper

10.1103/PhysRevB.67.161311

We report first-principles calculations of current-induced forces in Si atomic wires as a function of bias and wire length. We find that these forces are strongly nonlinear as a function of bias due to the competition between the force originating from the scattering states and the force due to bound states. We also find that the average force in the wire is larger the shorter the wire, suggesting that atomic wires are more difficult to break under current flow with increasing length. The last finding is in agreement with recent experimental data.

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