Spin accumulation and spin relaxation in a large open quantum dot

E. J. Koop*, B. J. van Wees, D. Reuter, A. D. Wieck, C. H. van der Wal

*Bijbehorende auteur voor dit werk

OnderzoeksoutputAcademicpeer review

23 Citaten (Scopus)
345 Downloads (Pure)

Samenvatting

We report electronic control and measurement of an imbalance between spin-up and spin-down electrons in micron-scale open quantum dots. Spin injection and detection were achieved with quantum point contacts tuned to have spin-selective transport, with four contacts per dot for realizing a nonlocal spin-valve circuit. This provides an interesting system for studies of spintronic effects since the contacts to reservoirs can be controlled and characterized with high accuracy. We show how this can be used to extract in a single measurement the relaxation time for electron spins inside a ballistic dot (tau(sf) approximate to 300 ps) and the degree of spin polarization of the contacts (P approximate to 0.8).

Originele taal-2English
Artikelnummer056602
Aantal pagina's4
TijdschriftPhysical Review Letters
Volume101
Nummer van het tijdschrift5
DOI's
StatusPublished - 1-aug.-2008

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