Theoretical imaging of current profiles in two-dimensional devices

A. Cresti (), G. Grosso and G. Pastori Parravicini

The European Physical Journal B: Condensed Matter and Complex Systems, 2006, vol. 53, issue 4, 537-549

Abstract: This paper addresses in a concise and rigorous way the basic tools for the study of local longitudinal and transverse microscopic currents in two-dimensional devices. The emphasis is on the optimized use of the Keldysh nonequilibrium Green's function theory together with the tight-binding representation of the electronic system. We elaborate general analytic expressions of current profiles, useful for modeling and simulating the local site-to-site flow of carriers; furthermore, in broken time-reversal symmetry, the formalism discerns unambiguously persistent and transport contributions to the bond currents. Our approach achieves a workable theoretical imaging, resolved in space and energy, of the microscopic currents through mesoscopic devices. Copyright EDP Sciences/Società Italiana di Fisica/Springer-Verlag 2006

Keywords: 72.10.Bg General formulation of transport theory; 73.63.-b Electronic transport in nanoscale materials and structures (search for similar items in EconPapers)
Date: 2006
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DOI: 10.1140/epjb/e2006-00408-2

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