Conductance of a disordered double quantum wire in a magnetic field: Boundary roughness scattering
2003 (English)In: PHYSICAL REVIEW B, Vol. 67, 115328- p.Article in journal (Refereed) Published
Boundary roughness scattering in disordered tunnel-coupled quantum wires in the presence of a magnetic
field is considered. The low-temperature conductance as a function of applied magnetic field is calculated for
different structure and disorder parameters using the method of the generalized S-matrix composition.We show
that despite the fact that lateral wire width fluctuations of the size of few atomic layers may significantly shift
the partial energy gap, the effect of the conductance enhancement at energies in the partial energy gap does
take place in sufficiently strong magnetic fields and small correlation length of the disorder defined as the
average distance between the neighboring discontinuities of the boundary profile. The last parameter is shown
to be particularly important for the determination of the transport properties of the system. Remarkably, we find
that in a wide range of system parameters the conductance decreases with the correlation length despite the
decreasing number of boundary discontinuities.
Place, publisher, year, edition, pages
2003. Vol. 67, 115328- p.
Condensed Matter Physics
IdentifiersURN: urn:nbn:se:uu:diva-77301DOI: doi:10.1103/PhysRevB.67.115328OAI: oai:DiVA.org:uu-77301DiVA: diva2:105213