https://doi.org/10.1007/s100510050017
Nonlinear-driven instability of dynamical plasma in solids: Emergence of spatially self-organized order and chaotic-like behavior
Instituto de Física "Gleb Wataghin",
Universidade Estadual de Campinas, Unicamp
13083-970 Campinas, São Paulo, Brazil
Corresponding author: a mago@inka.mssm.edu
Received:
8
July
1998
Revised:
6
May
1999
Published online: 15 January 2000
We analyze in detail the nonlinear kinetics of a carrier system in a photoinjected plasma in semiconductors under the action of constant illumination with ultraviolet light. We show that the spatially homogeneous steady-state becomes unstable, and a charge density wave emerges after a critical intensity of the incident radiation is achieved. It is shown that this instability can only follow in doped p-type materials. In bulk systems the critical intensity was found to be too high making the phenomenon not observable under realistic experimental conditions. However, a more efficient electron excitation can be obtained in low dimensional p-type systems, like some molecular and biological polymers, where the interaction may follow by chemical interaction with the medium. We show that for intensities beyond the critical threshold an increasing number of modes provide further contributions (subharmonics) to the space inhomogeneity. It is conjectured that this process could lead the system to display chaotic-like behavior.
PACS: 47.20.Hw – Morphological instability; phase changes / 47.20.Ky – Nonlinearity (including bifurcation theory)
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2000