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arXiv · 1211.1843

Semiclassical theory of the interaction correction to the conductance of antidot arrays

Martin Schneider·Georg Schwiete·Piet W. Brouwer
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Abstract

Electron-electron interactions are responsible for a correction to the conductance of a diffusive metal, the "Altshuler-Aronov correction" $\delta G_{AA}$. Here we study the counterpart of this correction for a ballistic conductor, in which the electron motion is governed by chaotic classical dynamics. In the ballistic conductance, the Ehrenfest time $\tau_{E}$ enters as an additional time scale that determines the magnitude of quantum interference effects. The Ehrenfest time effectively poses a short-time threshold for the trajectories contributing to the interaction correction. As a consequence, $\delta G_{AA}$ becomes exponentially suppressed if the Ehrenfest time is larger than the dwell time or the inverse temperature. We discuss the explicit dependence on Ehrenfest time in quasi-one and two-dimensional antidot arrays. For strong interactions, the sign of $\delta G_{AA}$ may change as a function of temperature for temperatures in the vicinity of $\hbar/\tau_{E}$.

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Martin Schneider, Georg Schwiete, Piet W. Brouwer. 2012-11-08. Semiclassical theory of the interaction correction to the conductance of antidot arrays. https://doi.org/10.1103/physrevb.87.195406

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