Nonlinear absorption of surface acoustic waves by composite fermions

Absorption of surface acoustic waves by a two-dimensional electron gas in a perpendicular magnetic field is considered. The structure of such system at the filling factor $\nu$ close to 1/2 can be understood as a gas of {\em composite fermions}. It is shown that the absorption at $\nu =1/2$ can be strongly nonlinear, while small deviation form 1/2 will restore the linear absorption. Study of nonlinear absorption allows one to determine the force acting upon the composite fermions from the acoustic wave at turning points of their trajectories.Comment: 7 pages, 1 figure, submitted to Europhysics letter

Molecular-dynamic modelling of the effect of external electromagnetic fields on contact melting of ion crystals

Translated from Russian (Fiz. Khim. Obrab. Mater. 1995 (6) p. 135-139)SIGLEAvailable from British Library Document Supply Centre-DSC:9023.190(VR-Trans--8736)T / BLDSC - British Library Document Supply CentreGBUnited Kingdo