Journal of Computational Electronics

, Volume 14, Issue 1, pp 257–261

Negative differential conductance in chromium based nano rings

Article
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Abstract

The electric current of \(Cr_8\) and \(Cr_7Ni\) molecular rings with two semi-infinite, \(Au\) leads have been investigated. We have performed numerical calculations using the non-equilibrium Green’s function method combined with the density functional theory. Then the electric current under a given applied bias voltage has been obtained in a two terminal molecular circuit system. Transport characteristics of these molecular-based quantum rings and coherent transport features of the system have been studied. It was shown that negative differential conductance regime arises, in several ranges of the bias voltage.

Keywords

Molecular rings Quantum transport  Non-equilibrium Green’s function DFT 

Copyright information

© Springer Science+Business Media New York 2014

Authors and Affiliations

  1. 1.Institute for Materials Science and Max Bergmann Center of BiomaterialsDresden University of TechnologyDresdenGermany
  2. 2.Department of PhysicsAzarbaijan Shahid Madani UniversityTabrizIran
  3. 3.Condensed Matter Computational Research LabAzarbaijan Shahid Madani UniversityTabrizIran

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