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

O. Entin-Wohlman, Y. Imry, S. A. Gurvitz, and A. Aharony
Phys. Rev. B 75, 193308 – Published 17 May 2007

Abstract

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.

  • Figure
  • Figure
  • Received 30 March 2007

DOI:https://doi.org/10.1103/PhysRevB.75.193308

©2007 American Physical Society

Authors & Affiliations

O. Entin-Wohlman1,2,*, Y. Imry3, S. A. Gurvitz4, and A. Aharony1

  • 1Department of Physics and the Ilse Katz Center for Meso- and Nano-Scale Science and Technology, Ben Gurion University, Beer Sheva 84105, Israel
  • 2Albert Einstein Minerva Center for Theoretical Physics, Weizmann Institute of Science, Rehovot 76100, Israel
  • 3Department of Condensed Matter Physics, Weizmann Institute of Science, Rehovot 76100, Israel
  • 4Department of Particle Physics, Weizmann Institute of Science, Rehovot 76100, Israel

  • *Electronic address: oraentin@bgu.ac.il

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Issue

Vol. 75, Iss. 19 — 15 May 2007

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