Volume 62, Number 5, June 2003
|Page(s)||712 - 718|
|Section||Condensed matter: electronic structure, electrical, magnetic, and optical properties|
|Published online||01 May 2003|
Spin blockade in ground-state resonance of a quantum dot
Center for NanoScience and Sektion Physik, Ludwig-Maximilians-Universität Ge schwister-Scholl-Platz 1, 80539 München, Germany
2 Walther-Meissner-Institut für Tieftemperaturforschung Walther-Meissner-Straße 8, 85748 Garching, Germany
3 Institut de Physique et Chimie des Matériaux de Strasbourg UMR 7504 (CNRS-ULP) - 23 rue du Loess, 67037 Strasbourg, France
4 Max-Planck-Institut für Festkörperforschung Heisenbergstraße 1, 70569 Stuttgart, Germany
Corresponding author: firstname.lastname@example.org
Accepted: 19 March 2003
We present measurements on spin blockade in a laterally integrated quantum dot. The dot is tuned into the regime of strong Coulomb blockade, confining electrons. At certain electronic states we find an additional mechanism suppressing electron transport. This we identify as spin blockade at zero bias, possibly accompanied by a change in orbital momentum in subsequent dot ground states. We support this by probing the bias, magnetic field and temperature dependence of the transport spectrum. Weak violation of the blockade is modelled by detailed calculations of non-linear transport taking into account forbidden transitions.
PACS: 73.21.La – Quantum dots / 85.35.Gv – Single-electron devices / 72.25.Rb – Spin relaxation and scattering
© EDP Sciences, 2003
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