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Published on: December 11, 2013
Breakdown of a gold nanowire between electrodes
Liqin Ke1, Takao Kotani, Mark van Schilfgaarde
1School of Materials, Arizona State University, Tempe, AZ 85287-8706, USA.
Nanotechnology
|July 7, 2011
Summary
Researchers studied atomic gold wire deformation using advanced computational methods. Collective atomic motions, especially perpendicular to the wire axis, were found to dominate, leading to wire breakage and energy barrier calculations.
Area of Science:
- Materials Science
- Condensed Matter Physics
- Computational Chemistry
Background:
- Understanding nanoscale material deformation is crucial for developing advanced electronics and mechanical systems.
- Atomic-scale behavior dictates macroscopic material properties.
Purpose of the Study:
- To investigate the deformation and breaking mechanisms of an atomic gold wire.
- To analyze the role of atomic dynamics and phonon modes in wire failure.
Main Methods:
- Utilized a generalization of the linear muffin-tin orbitals (LMTO) method.
- Employed the local-density approximation (LDA) for electronic structure calculations.
- Simulated the dynamical motion of atoms within the gold wire.
Main Results:
- Identified soft phonon modes contributing to collective atomic motion.
- Found that motions perpendicular to the wire axis are dominant in deformation.
- Calculated the energy barrier for large atomic displacements leading to wire breakage.
Conclusions:
- Collective atomic motions, particularly perpendicular to the axis, are key to atomic gold wire deformation.
- The study provides insights into the fundamental processes governing nanowire failure.
- Calculated energy barriers offer parameters for predicting material stability.
