'Universidad de Sevilla - Secretariado de Recursos Audiovisuales y Nuevas Tecnologias'
Abstract
Chains of identical ions, for which the dominant interaction is the electrostatic repulsion, appear in layered
silicates. The ions can move almost from site to site. The chains do not explode because the surrounding
media has a net negative charge which screens the Coulomb’s repulsion and become attractive when the ions
separate two much. Moreover there is a border effect which keeps the ions within the crystal.
We have been able to obtain moving supersonic kinks that keep their shape and cross nicely one with each
other and can travel over the surrounding sea of phonons. Their energies can be very different, from the order
of eVs to hundreds of them. Therefore they can influence many different processes within silicates.Ministerio de Ciencia e Innovación FIS2008-0484
