Time-dependent transport in mesoscopic systems: General formalism and applications

A. P. Jauho, N. S. Wingreen, Y. Meir

Research output: Contribution to journalArticle

7 Scopus citations

Abstract

We derive, with the Keldysh non-equilibrium Green function technique, an expression for the fully nonlinear, time-dependent current through an interacting mesoscopic system. For proportionate coupling to the leads, the time-averaged current is simply the integral between the chemical potentials of the time-averaged density of states, weighted by the coupling to the leads, in close analogy to the time-independent result of Meir and Wingreen (1992 Phys. Rev. Lett. 68, 2512). Explicit results for the exactly solvable non-interacting resonant tunnelling system are presented. Due to the coherence between the leads and the resonant site, the current shows a non-adiabatic behaviour with a ringing period which depends on the amplitude of the AC driving voltage. Finally, we establish a connection to recent linear response calculations.

Original languageEnglish (US)
Article number141
Pages (from-to)926-929
Number of pages4
JournalSemiconductor Science and Technology
Volume9
Issue number5 S
DOIs
StatePublished - Dec 1 1994

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering
  • Materials Chemistry

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