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Theoretical imaging of current profiles in two-dimensional devices

Author

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  • A. Cresti
  • G. Grosso
  • G. Pastori Parravicini

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

Suggested Citation

  • A. Cresti & G. Grosso & G. Pastori Parravicini, 2006. "Theoretical imaging of current profiles in two-dimensional devices," The European Physical Journal B: Condensed Matter and Complex Systems, Springer;EDP Sciences, vol. 53(4), pages 537-549, October.
    • Handle: RePEc:spr:eurphb:v:53:y:2006:i:4:p:537-549
    DOI: 10.1140/epjb/e2006-00408-2
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