Coulomb-Modified Fano Resonance in a One-Lead Quantum Dot

A. C. Johnson, C. M. Marcus, M. P. Hanson, and A. C. Gossard

Phys. Rev. Lett. 93, 106803 – Published 3 September 2004

Abstract

We investigate a tunable Fano interferometer consisting of a quantum dot coupled via tunneling to a one-dimensional channel. In addition to Fano resonance, the channel shows strong Coulomb response to the dot, with a single electron modulating channel conductance by factors up to 100. Where these effects coexist, line shapes with up to four extrema are found. A model of Coulomb-modified Fano resonance is developed and gives excellent agreement with experiment.

Received 22 December 2003

DOI:https://doi.org/10.1103/PhysRevLett.93.106803

Authors & Affiliations

A. C. Johnson¹, C. M. Marcus¹, M. P. Hanson², and A. C. Gossard²

¹Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA
²Department of Materials, University of California, Santa Barbara, California 93106, USA

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand

Issue

Vol. 93, Iss. 10 — 3 September 2004

Reuse & Permissions

Access Options

Author publication services for translation and copyediting assistance advertisement

Physical Review Letters