Negative differential conductance induced by electronic correlation in a double quantum-dot molecule

Details Negative differential conductance induced by electronic correlation in a double quantum-dot molecule Negative differential conductance induced by electronic correlation in a double quantum-dot molecule

2008-03-07

arxiv.org/abs/0803.1131v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

7 pages, 6 figures. Submitted to PRB

Scientific paper

10.1103/PhysRevB.78.045323

Electron tunneling through a two stage Kondo system constituted by a double quantum-dot molecule side coupled to a quantum wire, under the effect of a finite external potential is studied. We found that $I$-$V$ characteristic shows a negative differential conductance region induced by the electronic correlation. This phenomenon is a consequence of the properties of the two stage Kondo regime under the effect of an external applied potential that takes the system out of equilibrium. The problem is solved using the mean-field finite-$U$ slave-boson formalism.

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