## V. CONCLUSIONS 

We have determined the intra-Landau band magnetoplasmon spectrum for a modulated two dimensional electron gas in the presence of an external magnetic field and RSOI em- ploying the SCF approach at finite temperature. The magnetoplasmon spectrum of the modulated two-dimensional electron gas system is found to exhibit beating of Weiss oscil- lations due to Rashba effect as a function of the inverse magnetic field In the regime of low magnetic field, the modulation induced Weiss oscillations show beating pattern whose period is determined by the period of electric modulation and the strength of RSOI. Fur- thermore, we find that the beating pattern is damped but continues to persist at a finite but low temperature. Experimental study of these results should be quite revealing as they directly bear on many body properties of modulated 2DEG in the presence of RSOI. 

One of us (K. Sabeeh) would like to acknowledge the support of the Pakistan Science Foundation (PSF) through project No. C-QU/Phys (129). M. Tahir would like to acknowl- edge the support of the Pakistan Higher Education Commission (HEC). 

*Present address: Department of Physics, The Blackett Laboratory, Imperial College London, South Kensington Campus, London SW7 2AZ, United Kingdom, m.tahir06@imperial.ac.uk 

† Electronic address: ksabeeh@qau.edu.pk; kashifsabeeh@hotmail.com 

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