New Mechanism for Electronic Energy Relaxation in Nanocrystals

Details New Mechanism for Electronic Energy Relaxation in Nanocrystals New Mechanism for Electronic Energy Relaxation in Nanocrystals

2000-08-15

arxiv.org/abs/cond-mat/0008221v1

Physics

Condensed Matter

Materials Science

4 pages, Submitted to Physical Review B

Scientific paper

10.1103/PhysRevB.62.9398

The low-frequency vibrational spectrum of an isolated nanometer-scale solid differs dramatically from that of a bulk crystal, causing the decay of a localized electronic state by phonon emission to be inhibited. We show, however, that an electron can also interact with the rigid translational motion of a nanocrystal. The form of the coupling is dictated by the equivalence principle and is independent of the ordinary electron-phonon interaction. We calculate the rate of nonradiative energy relaxation provided by this mechanism and establish its experimental observability.

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