TY - JOUR
T1 - Stability of dust lattice modes in the presence of charged dust grain polarization in plasmas
AU - Kourakis, I.
AU - Shukla, P. K.
N1 - Funding Information:
Support from the Deutsche Forschungsgemeinschaft through Sonderforschungsbereich (SFB) 591—Universelles Verhalten Gleichgewichtsferner Plasmen: Heizung, Transport und Strukturbildung is gratefully acknowledged.
PY - 2006/2/20
Y1 - 2006/2/20
N2 - We discuss the effect of the attractive force associated with overlapping Debye spheres on the dispersion properties of the longitudinal and transverse dust lattice waves in strongly coupled dust crystals. The dust grain attraction is shown to contribute to a destabilization of the longitudinal dust lattice oscillations. The (optic-like) transverse mode dispersion law is shown to change, due to the Debye sphere dressing effect, from the known inverse-dispersive ("backward wave") form into a normal dispersive law (i.e. the group velocity changes sign). The stability of one-dimensionless bi-layers, consisting of (alternating) negatively and positively charged dust particles, is also discussed. The range of parameter values (mainly in terms of the lattice parameter κ) where the above predictions are valid, are presented.
AB - We discuss the effect of the attractive force associated with overlapping Debye spheres on the dispersion properties of the longitudinal and transverse dust lattice waves in strongly coupled dust crystals. The dust grain attraction is shown to contribute to a destabilization of the longitudinal dust lattice oscillations. The (optic-like) transverse mode dispersion law is shown to change, due to the Debye sphere dressing effect, from the known inverse-dispersive ("backward wave") form into a normal dispersive law (i.e. the group velocity changes sign). The stability of one-dimensionless bi-layers, consisting of (alternating) negatively and positively charged dust particles, is also discussed. The range of parameter values (mainly in terms of the lattice parameter κ) where the above predictions are valid, are presented.
KW - Dust lattice oscillations
KW - Dusty plasma crystals
KW - Electrostatic interactions
UR - http://www.scopus.com/inward/record.url?scp=31744433851&partnerID=8YFLogxK
U2 - 10.1016/j.physleta.2005.10.062
DO - 10.1016/j.physleta.2005.10.062
M3 - Article
AN - SCOPUS:31744433851
SN - 0375-9601
VL - 351
SP - 101
EP - 104
JO - Physics Letters, Section A: General, Atomic and Solid State Physics
JF - Physics Letters, Section A: General, Atomic and Solid State Physics
IS - 1-2
ER -