Transition from coherent to ohmic conductance explained by a statistical model for the effects of decoherence
In: MRS Online Proceedings Library, Jg. 2010 (2010) ; Nr. 1260, S. 1260-T12-02
Zeitschriftenaufsatz / Fach: Physik
Using a statistical model for the effects of decoherence , we show that in linear tight-binding samples ohmic conductance (resistance proportional to length) is reached for any finite density p of decoherence sites, if the chemical potential μ of the contacts is within a conducting band. If μ is outside a band, or if due to disorder, no bands form, for high decoherence densities p>p* still ohmic conductance is reached, where p* is a critical decoherence density. For p<p*, the sample resistance increases exponentially with the length
Dieser Eintrag ist freigegeben.