The role of bound states in time-dependent quantum transport |
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Authors: | E Khosravi S Kurth G Stefanucci E K U Gross |
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Institution: | 1. Institut für Theoretische Physik, Freie Universit?t Berlin, Arnimallee 14, 14195, Berlin, Germany 2. European Theoretical Spectroscopy Facility (ETSF)
http://www.etsf.eu 3. Department of Physics, University of Rome Tor Vergata, Via della Ricerca Scientifica 1, 00133, Rome, Italy
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Abstract: | Charge transport through a nanoscale junction coupled to two macroscopic electrodes is investigated for the situation when
bound states are present. We provide numerical evidence that bound states give rise to persistent, non-decaying current oscillations
in the junction. We also show that the amplitude of these oscillations can exhibit a strong dependence on the history of the
applied potential as well as on the initial equilibrium configuration. Our simulations allow for a quantitative investigation
of several transient features. We also discuss the existence of different timescales and address their microscopic origin. |
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Keywords: | PACS" target="_blank">PACS 05 60 Gg 72 10 -d 73 23 -b 73 63 -b |
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