Negative differential conductance in chromium based nano rings
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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.
KeywordsMolecular rings Quantum transport Non-equilibrium Green’s function DFT
We gratefully acknowledge Molecular Simulation Lab. (MSL) of Azarbaijan Shahid Madani University for providing high performance computational support.
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