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    STUDIA PHYSICA - Issue no. 1 / 2008  
         
  Article:   FRIEDEL OSCILLATIONS IN ONE-DIMENSION: MANY IMPURITIES AND BIAS VOLTAGE EFFECTS.

Authors:  L. TUGULAN.
 
       
         
  Abstract:   Using the linear response theory we studied the Friedel oscillations in a one-dimensional noninteracting electron gas in the presence of impurities. The impurities potential is assumed to have periodic delta-function and square-well form. The particular cases of a single impurity, two and three impurities are also analyzed. The oscillations are strongly affected by the distance between impurities. The effect of the bias voltage on the Friedel oscillations in a wire with one impurity, coupled to macroscopic electrodes, is also analyzed.

Keywords: One-dimensional electron gas, Many impurities, Short-range interactions, Friedel oscillations, Single impurity, Two impurities, Three impurities, Bias voltage effects.
 
         
     
         
         
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