scholarly journals Ground-state energy and Wigner crystallization in thick two-dimensional electron systems

2005 ◽  
Vol 72 (19) ◽  
Author(s):  
D. Jost ◽  
M. W. C. Dharma-wardana
Keyword(s):  
Ground State Energy ◽  
Ground State ◽  
State Energy ◽  
Two Dimensional ◽  
Electron Systems ◽  
Dimensional Electron ◽  
Wigner Crystallization ◽  
Two Dimensional Electron Systems

scholarly journals GROUND-STATE ENERGY AND COMPRESSIBILITY OF A DISORDERED TWO-DIMENSIONAL ELECTRON GAS

2007 ◽  
Vol 21 (13n14) ◽  
pp. 2134-2144 ◽  
Author(s):  
B. TANATAR ◽  
A. L. SUBAŞI ◽  
K. ESFARJANI ◽  
S. M. FAZELI
Keyword(s):  
Ground State Energy ◽  
Ground State ◽  
Density Functional ◽  
State Energy ◽  
Critical Density ◽  
Electron System ◽  
Local Spin Density Approximation ◽  
Two Dimensional ◽  
Electron Systems ◽  
Dimensional Electron Gas

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.

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