Intersubband Optic Phonon Resonances in Electrostatically Confined Quantum Wires

Le résumé fourni par la source

This chapter analyses the occurrence of resonant intersubband optic phonon scattering in an array of quantum wires at high temperatures. Self-consistent solutions of the Schrödinger and Poisson equations with a subsequent Monte Carlo analysis of intersubband scattering reveal a strong resonant polar optic phonon coupling between subbands at the gate bias indicated by the experimental data. The observation of resonant scattering is only possible because the quasi-one-dimensional (1D) form of Gauss’ law shows an opposite trend to that for two-dimensional systems in the dependence of the eigenenergy spectrum on gate bias. The physics of 1D systems has attracted much attention in recent years. Quantum effects such as conductance fluctuations, quantized conductance and electron interferences are now routinely observed in well-prepared high mobility samples. With increasing temperature, phonon scattering destroys the coherence of the electron wave, and thermal broadening of the carrier distribution function erases the resolution between adjacent quantized 1D levels.

Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.