Steps and dips in the ac conductance and noise of mesoscopic structures

Details Steps and dips in the ac conductance and noise of mesoscopic structures Steps and dips in the ac conductance and noise of mesoscopic structures

2006-08-17

arxiv.org/abs/cond-mat/0608406v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 2 figures

Scientific paper

10.1103/PhysRevB.75.193308

The frequency dependence of the equilibrium ac conductance (or the noise power spectrum) through a mesoscopic structure is shown to exhibit steps and dips. The steps, at energies related to the resonances of the structure, are closely related to the partial Friedel phases of these resonances, thus allowing a direct measurement of these phases (without interferometry). The dips in the spectrum are related to a destructive interference in the absorption of energy by transitions between these resonances, in some similarity with the Fano effect.

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