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Journal Article

A widely tunable few-electron droplet

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Eberl,  K.
Former Scientific Facilities, Max Planck Institute for Solid State Research, Max Planck Society;

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Citation

Hüttel, A. K., Eberl, K., & Ludwig, S. (2007). A widely tunable few-electron droplet. Journal of Physics: Condensed Matter, 19(23): 236202.


Cite as: https://hdl.handle.net/21.11116/0000-000F-01AF-B
Abstract
Quasi- static transport measurements are employed to characterize a few-electron quantum dot electrostatically defined in a GaAs/ AlGaAs heterostructure. The gate geometry allows observations on one and the same electron droplet within a wide range of coupling strengths to the leads. The weak coupling regime is described by discrete quantum states. At strong interaction with the leads, Kondo phenomena are observed as a function of a magnetic field. By varying the gate voltages the electron droplet can, in addition, be distorted into a double quantum dot with a strong interdot tunnel coupling while keeping track of the number of trapped electrons.