ERA NanoSci - Coupling of Single Quantum Dots to Two-Dimensional Systems

• Applicants: Professor Dr. Dieter Bimberg; Privatdozent Dr. Martin Geller
• Subject Area: Experimental Condensed Matter Physics ; Theoretical Chemistry: Electronic Structure, Dynamics, Simulation
• Term: from 2009 to 2013
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 120319092

The interaction between nano-objects of different dimensionality, e.g. electrostatic Coulomb-coupling of zerodimensional quantum dots (QDs) to two-dimensional (2D) systems is of fundamental interest and of great relevance for future charge-based memories. This interaction shall be studied here. The complementary expertise of the partners will allow the innovative approach to study for the first time Sb-based QDs combined with split-gate structures. Precise control of the charge-state of a single QD will be possible. Sb-based QDs in type-II heterostructures have strong hole confinement yielding a potential retention time of many years at room temperature, enabling the analysis of the influence of charged QDs on a 2D system up to 300 K. In the mid-long term perspective, the results will be important for future generations of memories: knowledge of the interaction of a 2D system with a single QD will allow us to reach the ultimate limits of charged-based memories (in particular Flash).

• DFG Programme: Research Grants
• International Connection: Netherlands, United Kingdom
• Participating Persons: Dr. Jens K. Garleff; Professor Dr. Manus Hayne