Showing papers by "Luciano Pietronero published in 1978"
104 citations
TL;DR: In this paper, the dynamics of collective excitations of a chain of interacting ions in a periodic potential including the effects of discreteness and of thermal damping are studied, and a method to discriminate between the various possible cases ranging from soliton like propagation to the hopping of the collective coordinate is described.
25 citations
TL;DR: In this article, the Brownian motion of a polarizable ion (within the shell model) in a periodic potential with the method of the memory function has been studied and the polarizability is shown to increase the conductivity only at frequencies different from zero.
Abstract: We study the Brownian motion of a polarizable ion (within the shell model) in a periodic potential with the method of the memory function. The polarizability is shown to increase the conductivity only at frequencies different from zero.
1 citations