Discrete breathers are time-periodic spatially localised motions in networks of oscillators. Their occurrence in three principal contexts is reviewed: (i) autonomous Hamiltonian or reversible systems, (ii) autonomous forced damped systems, and (iii) time-periodically forced systems. The main...

A simple Kronig-Penney model for 1D mesoscopic systems with disordered δ-peak and finite width potentials is used to study numerically the influence of a constant electric field on the conductance fluctuations and probability distribution. The electric field applied to such systems allows us to...

We present the results of measurements of two-dimensional electron transport in Si-δ-doped GaAs samples compensated with Be acceptors. It is shown that the temperature dependence of longitudinal resistivity Rxx in the interval 1K–100mK is well described by the variable-range-hopping mechanism...