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Charging Effects in Ultrasmall Quantum Dots in the Presence of Time-Varying Fields | | C. Bruder
; H. Schoeller
; | | Date: |
15 Jun 1993 | | Subject: | cond-mat | | Abstract: | The influence of charging effects on time-dependent transport in small semiconductor quantum dots with arbitrary level spectra is studied. Starting from an explicit time-dependent tunneling Hamiltonian, a non-Markovian Master equation is derived which is also valid in the nonlinear response regime. The many-body nonequilibrium distribution functions of the dot are calculated and the I-V characteristic of the structure including the displacement currents is obtained. New resonant features show up in the Coulomb oscillations and in the Coulomb staircase, and a new possibility to realize electronic pumps is described. | | Source: | arXiv, cond-mat/9306033 | | Services: | Forum | Review | PDF | Favorites | |
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