Article

# Symmetry of two-terminal nonlinear electric conduction.

Solid State Physics and The Nanometer Consortium, Lund University, Box 118, S-22100 Lund, Sweden.

Physical Review Letters (Impact Factor: 7.73). 02/2004; 92(4):046803. DOI: 10.1103/PhysRevLett.92.046803 Source: PubMed

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**ABSTRACT:**We investigate the effect of a scanning gate tip in the nonlinear quantum transport properties of nanostructures. Generally, we predict that the symmetry of the current-voltage characteristic in reflection-symmetric samples is broken by a tip-induced rectifying conductance correction. Moreover, in the case of a quantum point contact (QPC), the tip-induced rectification term becomes dominant as compared to the change of the linear conductance at large tip-QPC distances. Calculations for a weak tip probing a QPC modeled by an abrupt constriction show that these effects are experimentally observable.Physical Review B 12/2013; 89(11). · 3.66 Impact Factor - [Show abstract] [Hide abstract]

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