Tunneling effects on the impurity spectral function in coupled asymmetric quantum wires

Marcos R. S. Tavares, G.-Q. Hai, and G. E. Marques
Phys. Rev. B 68, 165304 – Published 8 October 2003
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Abstract

The impurity spectral function is studied in coupled double quantum wires at finite temperatures. Simple anisotropy in the confinement direction of the wires leads to finite nondiagonal elements of the impurity spectral function matrix. These nondiagonal elements are responsible for tunneling effects and result in a pronounced extra peak in the impurity spectral function up to temperatures as high as 20 K.

  • Received 12 April 2003

DOI:https://doi.org/10.1103/PhysRevB.68.165304

©2003 American Physical Society

Authors & Affiliations

Marcos R. S. Tavares

  • Faculdade de Tecnologia da Baixada Santista, CEETPS, Santos, SP 11045-908, Brazil

G.-Q. Hai

  • Instituto de Física de São Carlos, Universidade de São Paulo, São Carlos, SP 13560-970, Brazil

G. E. Marques

  • Departamento de Física, Universidade Federal de São Carlos, São Carlos, SP 13565-905, Brazil

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Vol. 68, Iss. 16 — 15 October 2003

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