Volume 71, Number 6, September 2005
|Page(s)||966 - 972|
|Section||Condensed matter: electronic structure, electrical, magnetic, and optical properties|
|Published online||10 August 2005|
Effect of temperature and bias voltage on the conductance distribution of disordered quantum wires
Institut für Theorie der Kondensierten Materie, Universität Karlsruhe Wolfgang-Gaedestr. 1, 76128 Karlsruhe, Germany
2 Max-Planck-Institut für Physik komplexer Systeme Nöthnitzer Strasse 38, 01187 Dresden, Germany
Accepted: 12 July 2005
The statistical properties of the conductance of one-dimensional disordered systems are studied at finite bias voltage V and temperature T, in an independent-electron picture. We calculate the complete distribution of the conductance in different regimes of V, T within a statistical model of resonant tunneling transmission. We find that changes from the well-known log-normal distribution at in the linear response regime to a Gaussian distribution at large V, T. The dependence on T and V of average quantities such as , is analyzed as well. Our analytical results are confirmed by numerical simulations. We also discuss the limits of validity of the model and conclude that the effects of finite T, V presented here should be observable.
PACS: 72.10.-d – Theory of electronic transport; scattering mechanisms / 73.23.-b – Electronic transport in mesoscopic systems
© EDP Sciences, 2005
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.