English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

We investigate the nonlinear current-voltage characteristic of mesoscopicconductors and the current generated through rectification of an alternatingexternal bias. To leading order in applied voltages both the nonlinear and therectified current are quadratic. This current response can be described interms of second order conductance coefficients and for a generic mesoscopicconductor they fluctuate randomly from sample to sample. Due to Coulombinteractions the symmetry of transport under magnetic field inversion is brokenin a two-terminal setup. Therefore, we consider both the symmetric andantisymmetric nonlinear conductances separately. We treat interactionsself-consistently taking into account nearby gates.  The nonlinear current is determined by different combinations of second orderconductances depending on the way external voltages are varied away from anequilibrium reference point (bias mode). We discuss the role of the bias modeand circuit asymmetry in recent experiments. In a photovoltaic experiment thealternating perturbations are rectified, and the fluctuations of the nonlinearconductance are shown to decrease with frequency. Their asymptotical behaviorstrongly depends on the bias mode and in general the antisymmetric conductanceis suppressed stronger then the symmetric conductance.  We next investigate nonlinear transport and rectification in chaotic rings.To this extent we develop a model which combines a chaotic quantum dot and aballistic arm to enclose an Aharonov-Bohm flux. In the linear two-probeconductance the phase of the Aharonov-Bohm oscillation is pinned while innonlinear transport phase rigidity is lost. We discuss the shape of themesoscopic distribution of the phase and determine the phase fluctuations.

Rectification and nonlinear transport in chaotic dots and rings