Quasi-band structure of quantum-confined nanocrystals

We discuss the electronic properties of quantum-confined nanocrystals. In particular, we show how, starting from the discrete molecular states of small nanocrystals, an approximate band structure (quasi-band structure) emerges with increasing particle size. Finite temperature is found to broaden the discrete states in energy space forming even for nanocrystals in the quantum-confinement regime quasi-continuous bands in k-space. This bands can be, to a certain extend, interpreted along the lines of standard band structure theory, while taking also finite size and surface effects into account. We discuss this on various prototypical nanocrystal systems.

Automated summary

We discuss the electronic properties of quantum-confined nanocrystals. In particular, we show how an approximate band structure emerges with increasing particle size from the discrete molecular states of small nanocrystals. The discrete states are broadened in energy space at finite temperature, forming quasi-continuous bands in k-space, which can be interpreted along the lines of standard band structure theory, considering finite size and surface effects. Various prototypical nanocrystal systems are discussed.