 BackResearch Article ScienceAsia 13 (1987): 221-229 |doi: 10.2306/scienceasia1513-1874.1987.13.221
GROUND STATE ENERGY IN THE SCREENED POIENTIAL OF TWO-DIMENSIONAL ELECTRON GAS AT FINITE TEMPERATURES
S. PHATISENAABSTRACT: The effect of screening on ground state energy of bound system of hydrogenic impurity and electron in a homogeneous two-dimensional electron gas (2-DEG) is studied within the linear response theory. The temperature and density dependent Lindhard function has been used. The long wavelength value of this function shows maximum in both high and low temperature limits. The ground state energy can be approximately calculated using the long wavelength limit in both low and high temperatures by the variational method. The result is in agreement with the work done by Stern and Howard1. especially in the high temparature limit. Department of Physics, Ubon Teachers College, Ubolratchathani 34000, Thailand. Received 7 October 1987
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