[Pending] Nanoelectronic Modeling Lecture 31b: Quantum Dot Stacks
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This presentation demonstrates the natural trend of strain-induced quantum dots to grow on top of each other. The consequences on the electronic states in the quantum dot are considered.
- Experimental evidence of vertical quantum dot stack development
- Quantum dot molecular states
- Strain coupling – strain fields
- Quantum dot molecule – 2 quantum dots - Strain effects on the bandstructure – dependence on the quantum dot separation – electron and hole states
- 7 dot stack
- Quantum dot stacks have been built experimentally
- Quantum dot stacks can act like artificial molecules when placed close enough
- Strain coupling between dots plays a crucial role to modulate the local electronic structure profile
- There are no perfectly identical coupled quantum dot disks
- Two competing processes:
- Strain tends to push the electron ground state to the bottom of the stack
- The larger quantum dots on the top of the stack suggest the ground state is at the top of the dot
Researchers should cite this work as follows:
; ; (2010), "Nanoelectronic Modeling Lecture 31b: Quantum Dot Stacks," https://nanohub.org/resources/9271.
Università di Pisa, Pisa, Italy