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    STUDIA PHYSICA - Issue no. 2 / 2005  
         
  Article:   ZERO SOUND IN TWO DIMENSIONS.

Authors:  I. GROSU, O. BUNĂU.
 
       
         
  Abstract:  Using a simple repulsive contact interaction model we calculated the dispersion relation for the zero sound mode in two dimensional interacting Fermi systems. The almost linear dispersion relation reduces to the linear form in the long-wave limit. The damping of the mode appears at a critical wavevector which was calculated.  
         
     
         
         
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