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Channel saturation and conductance quantization in single-atom gold constrictions
Armstrong, JN Schaub, RM Hua, SZ Chopra, HD
Armstrong, JN
Schaub, RM
Hua, SZ
Chopra, HD
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2010-11-09
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10.1103/PhysRevB.82.195416
Abstract
It is shown that the finite elasticity of atomic-sized gold constrictions allows for a continuous and reversible change in conductance. This is achieved by superposition of atomic-scale or subatomic-scale mechanical oscillations on a steadily retracting/approaching gold tip against a gold substrate. Through these perturbation studies, we report the direct observation of channel saturation and conductance quantization in stable, single-atom gold constrictions. In addition, the origin of peaks in conductance histograms is explained, and the peaks alone are shown to be insufficient in evaluating the stability of atomic configurations. © 2010 The American Physical Society.
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Physical Review B - Condensed Matter and Materials Physics
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