Impurity effects on the resonant Andreev reflection in a finite-sized carbon nanotube system

Abstract

The influence of the impurity on the resonant Andreev reflection through a normal-metal/carbon-nanotube/superconductor system is studied theoretically. It is found that the resonant Andreev reflection depends on the strength of the impurity and the length of the armchair nanotube. The impurity which breaks the electron-hole symmetry of the nanotubes greatly reduces the resonant Andreev reflection. The symmetry broken depends distinctly on the impurity strength. The impurity effects on the Andreev reflection current at different bias are also studied.

9 pages, 6 figures

References in corpus (2)

• Conductance of carbon nanotubes with disorder: A numerical study
• Resonant Andreev reflections in superconductor-carbon-nanotube devices

Cited by in corpus (4)

• Spin-polarized Andreev transport influenced by Coulomb repulsion through two quantum dot system
• Spin-dependent thermoelectric phenomena in a quantum dot attached to ferromagnetic and superconducting electrodes
• Andreev reflection through Fano resonances in molecular wires
• Universal Conductance Fluctuations in Mesoscopic Systems with Superconducting Leads: Beyond the Andreev Approximation