Interplay between phonon confinement and Fano effect on Raman line shape for semiconductor nanostructures: Analytical study

Stimulated Raman Scattering in Semiconductor Nanostructures

Effect of charge orderingÕdisordering on Raman line shape in manganites

Manganites are characterized by a fascinating interplay of double exchange, spin and charge fluctuations, and orbital excitations. In this paper we focus attention on charge fluctuations and concomitant charge ordering/disordering, influenced by phonons. Our theoretical results, based on a resolvent expansion of the time-development operator ~propagator!, are specially tailored for calculating ...

Acoustic phonon confinement in silicon nanolayers: Effect on electron mobility

We demonstrate the confinement of acoustic phonons in ultrathin silicon layers and study its effect on electron mobility. We develop a model for confined acoustic phonons in an ideal single-layer structure and in a more realistic three-layer structure. Phonon quantization is recovered, and the dispersion relations for distinct phonon modes are computed. This allows us to obtain the confined pho...

Engineering the strain field for the control of quantum confinement: An analytical model for arbitrary shape nanostructures

Analytical Study of the Interplay between Architecture and Predictability

We study model feed forward networks as time series predictors in the stationary limit The focus is on complex yet non chaotic behavior The main question we address is whether the asymptotic behavior is governed by the architecture regardless the details of the weights We nd hierarchies among classes of architectures with respect to the attractor dimension of the long term sequence they are cap...