Ground-state energy and compressibility of a disordered two-dimensional electron gas
Subaşi, A. L.
Fazeli, S. M.
International Journal of Modern Physics B
0217-9792 (print)1793-6578 (online)
2134 - 2144
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Please cite this item using this persistent URLhttp://hdl.handle.net/11693/27106
Two-dimensional (2D) electron systems in the presence of disorder are of interest in connection with the observed metal-insulator transition in such systems. We use density functional theory in its local-spin density approximation (LSDA) to calculate the ground-state energy of a 2D electron system in the presence of remote charged impurities which up on averaging provides disorder. The inverse compressibility calculated from the ground-state energy exhibits a minimum at a critical density controlled by the disorder strength. Our findings are in agreement with experimental results.