Mesoscopic fluctuations of Coulomb drag between quasiballistic one-dimensional wires

Niels Asger Mortensen*, Karsten Flensberg, Antti Pekka Jauho

*Corresponding author af dette arbejde

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

14 Citationer (Scopus)

Abstract

Quasiballistic one-dimensional quantum wires are known to have a conductance of the order of 2e2/h, with small sample-to-sample fluctuations. We present a study of the transconductance G12 of two Coulomb-coupled quasiballistic wires; i.e., we consider the Coulomb drag geometry. We show that the fluctuations in G12 differ dramatically from those of the diagonal conductance Gii: the fluctuations are large and can even exceed the mean value, thus implying a possible reversal of the induced drag current. We report extensive numerical simulations elucidating the fluctuations for both correlated and uncorrelated disorder. We also present analytic arguments, which fully account for the trends observed numerically.

OriginalsprogEngelsk
Artikelnummer085317
TidsskriftPhysical Review B - Condensed Matter and Materials Physics
Vol/bind65
Udgave nummer8
Sider (fra-til)853171-8531710
Antal sider7.678.540
ISSN0163-1829
StatusUdgivet - 15 feb. 2002

Citationsformater