Regensburg 2000 – wissenschaftliches Programm

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TT: Tiefe Temperaturen

TT 17: Postersitzung II: Pinning und Vortexdynamik (1-8), Supraleitung: Theorie (9-13), Korrelierte Elektronen (14-48), Niederdimensionale Systeme (49-68), Quantenflüssigkeiten (69-75)

TT 17.48: Poster

Mittwoch, 29. März 2000, 14:30–18:00, A

Transport in a leaky Luttinger liquid — •M. Governale, M. Grifoni, and G. Schön — Institut für Theoretische Festkörperphysik, Universität Karlsruhe

We investigate the transport properties of correlated electrons in a one-dimensional “leaky” electron waveguide. Over a finite length L the wire is separated from a coplanar two-dimensional electron gas (2DEG) by a thin sidewall of the confining potential. Therefore the 1D electrons can leak out through the thin side barrier into the 2DEG. Treating the 1D electrons within the Luttinger liquid model, we evaluate the current flowing through the waveguide, as well as the tunneling current. Our results allow us to relate fundamental properties of the 1D correlated electron system, such as the density of states [1], to quantities that can be measured by transport experiments. Such a device has already been experimentally realized in a semiconductor heterostructure by use of split-gate techniques [2].
[1] A. Altland, C. H. W. Barnes, F. W. .J. Hekking, and A. .J. Schofield, Phys. Rev. Lett. 83, 1203 (1999).
[2] C. C. Eugster and J. A. del Alamo, Phys. Rev. Lett. 67, 3586 (1991).