Shot noise in spin pumps
✍ Scribed by Rafael Sánchez; Franz J. Kaiser; Sigmund Kohler; Peter Hänggi; Gloria Platero
- Book ID
- 104084875
- Publisher
- Elsevier Science
- Year
- 2008
- Tongue
- English
- Weight
- 150 KB
- Volume
- 40
- Category
- Article
- ISSN
- 1386-9477
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✦ Synopsis
We study the noise properties of a double quantum dot driven by an AC electric field that pumps electrons between two unbiased leads. In the presence of a static magnetic field, it is possible to tune the gate voltage such that the resulting current consists mainly of spin-polarized electrons. We find that for particular driving amplitudes, the current is quenched and possesses super-Poissonian shot noise.
📜 SIMILAR VOLUMES
We report the observation of enhanced spin-dependent shot noise in magnetic tunnel barriers, suggesting transport through localized states within the barrier. This is supported by the existence of negative magnetoresistance and structure in the differential conductance curves. A simple model of tunn