mesh plot - Z must be a matrix - problem resolved
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% Data
T=300;
k=1.38064852e-23;
Ea=7.2*10^(-21);
Ed=7.2*10^(-21);
Nv=2.5*10^(25)*((0.59*T/300)^(3/2))*10^(-6);
Nc=2.5*10^(25)*((1.08*T/300)^(3/2))*10^(-6);
Ec=0.5*(1.166-0.000473*T*T/(636+T))*1.6*10^(-19);
Ev=0;
% Scale energy levels
kT = k*T;
Ea = Ea/kT; Ed = Ed/kT; Ec = Ec/kT; Ev = Ev/kT;
% Collect data to be passed to function
data = [Ea, Ed, Nv, Nc, Ec, Ev];
% Dopant concentrations
Nd = [4E13, 6E13, 7E18, 1E17, 1E15, 1E15, 1E13, 1E15, 1E15, 2E16, 2.5E15];
Na = [1E15, 1E13, 1E15, 1E15, 1E17, 1E15, 8E14, 5E13, 6.E15, 6.4E13, 6.3E17];
n = numel(Nd) ; m = numel(Na) ;
Ef = zeros(m,n);
[Na,Nd] = meshgrid(Na,Nd) ;
Ef0 = 10^(-21)/kT; % Initial guess at scaled fermi energy
% Use fzero to find fermi energy, i.e. the value of Ef that makes
% function Efn return zero
for i = 1:n
for j = 1:m
Ef(i,j) = fzero(@Efn, Ef0,[],data,Nd(i,j),Na(i,j));
end
end
Ef = Ef*kT; % Rescale
fprintf('%g\n',Ef)
pcolor(Na,Nd,Ef)
%patch(Na,Nd,Ef)
%plot3(Na,Nd,Ef)
grid on
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