F. Castro et al., ACCURATE CLOSED-FORM EXPRESSION FOR SHEET CARRIER DENSITY CALCULATIONS IN MODULATION-DOPED HETEROSTRUCTURES, Electronics Letters, 34(22), 1998, pp. 2170-2171
An accurate expression for sheet carrier density (n(s)) calculations i
n modulation-doped heterostructures is developed from a nonlinear mode
l of the Fermi potential variation with n(s). This closed-form express
ion produces numerical results that agree well with computer simulatio
ns of low sheet carrier density AlGaAs/GaAs heterostructures at 300 K.