Week6HWSolutions

067 1 effective mass coefficient alpha 064 ev non

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Unformatted text preview: function ece656_hw6_1b() % ECE 656 (Fall 2013) HW#6, 1b % This script plots and compares the density of modes for GaAs assuming parabolic and % non-parabolic energy bands Parameters m_star = 0.067; % (1) effective mass coefficient alpha = 0.64; % (/eV) non-parabolicty factor m_o = 0.511e6; % (eV/c^2) electron rest mass hbar = 6.582e-16; % (eV-s) m = m_star*m_o; % (eV/c^2) electron effective mass E = linspace(0,0.3,100); % (eV) range of energy Calculation of Modes M_3D_nonp = m./(2*pi*hbar^2).*E.*(1+alpha.*E).*1e-4; % (/cm^2) M_3D_p = m./(2*pi*hbar^2).*E.*1e-4; % (/cm^2) Plots figure(1) plot(E, M_3D_nonp,'LineWidth',2) hold on plot(E, M_3D_p,'--','LineWidth',2) xlabel('Energy (eV)'); ylabel('M(E) (/cm^2)'); legend('Non-parabolic', 'Parabolic','Location','NorthWest'); xlim([0 max(E)]) font_size = 12; set(gcf, 'color', 'white'); set(gca, 'FontSize', font_size); set(get(gca,'title'), 'FontSize',font_size); set(get(gca,'xlabel'),'FontSize',font_size); 1 ECE ­656 4 Fall 2013 Mark Lundstrom 9/27/13 set(get(gca,'ylabel'),'FontSize',font_size); Published with MATLAB® R2013a 2 ECE ­656 5 Fall 2013...
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