Negative differential conductance in chromium based nano rings

Negative differential conductance in chromium based nano rings

The electric current of C r 8 and C r 7 N i molecular rings with two semi-infinite, A u 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 applie...

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Veröffentlicht in:Journal of computational electronics 2015-03, Vol.14 (1), p.257-261
Hauptverfasser: Nikipar, S., Phirouznia, A.
Format: Artikel
Sprache:eng
Schlagworte:
Approximation
Bias
Circuits
Density functional theory
Electric currents
Electric potential
Electrical Engineering
Electrons
Energy
Engineering
Green's functions
Investigations
Lead
Mathematical and Computational Engineering
Mathematical and Computational Physics
Mechanical Engineering
Optical and Electronic Materials
Quantum dots
Theoretical
Transport properties
Voltage
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Beschreibung
Zusammenfassung:The electric current of C r 8 and C r 7 N i molecular rings with two semi-infinite, A u 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.
ISSN:1569-8025
1572-8137
DOI:10.1007/s10825-014-0645-1