Volume 72, Number 2, October 2005
|Page(s)||294 - 300|
|Section||Interdisciplinary physics and related areas of science and technology|
|Published online||14 September 2005|
Hanle effect in transport through quantum dots coupled to ferromagnetic leads
Institut für Theoretische Physik III, Ruhr-Universität Bochum 44780 Bochum, Germany
2 Institut für Theoretische Festkörperphysik, Universität Karlsruhe 76128 Karlsruhe, Germany
3 Institute of Molecular Physics, Polish Academy of Science - 60-179 Poznań, Poland
4 Institute for Materials Research, Tohoku University - Sendai 980-8577, Japan
Accepted: 22 August 2005
We suggest a series of transport experiments on spin precession in quantum dots coupled to one or two ferromagnetic leads. A finite dot-spin polarization is created by spin injection and analyzed via the linear conductance through the dot, while an applied magnetic field gives rise to the Hanle effect. Such a Hanle experiment can be used to determine the spin lifetime in the quantum dot, to measure the spin injection efficiency into the dot, as well as proving the existence of intrinsic spin precession which is driven by the Coulomb interaction.
PACS: 85.75.-d – Magnetoelectronics; spintronics: devices exploiting spin polarized transport or integrated magnetic fields / 73.63.Kv – Quantum dots / 73.23.Hk – Coulomb blockade; single-electron tunneling
© EDP Sciences, 2005
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