50 lines
978 B
Matlab
50 lines
978 B
Matlab
%% conductivity_calculations.m
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%%
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%% calculate and present 2D sheet conductivty for graphene
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close all;clear all; clc;
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DISPLAY_HZ = true;
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MIN_F = 9;
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MAX_F = 15;
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F_TOTAL = 1e2;
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x_vals = logspace(MIN_F, MAX_F, F_TOTAL); % hz
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x_vals = x_vals .* (2*pi); % rads-1
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cond = [];
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for x=x_vals
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% omega (rads-1), fermi_level (J), temp (K), scatter_lifetime (s-1)
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cond = [cond sheet_conductivity(x, ev_to_j(3), 300, 5e-12)];
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end
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if DISPLAY_HZ % divide radians back to hertz
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x_vals = x_vals ./ (2*pi);
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end
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figure(1);
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%plot(x_vals, real(cond));
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semilogx(x_vals, real(cond));
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grid();
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title('2D Sheet Real Conductivity');
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ylabel('Conductivity (S/m)');
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if DISPLAY_HZ
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xlabel('Frequency (Hz)');
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else
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xlabel('Frequency (rads-1)');
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end
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figure(2);
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%plot(x_vals, imag(cond));
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semilogx(x_vals, imag(cond));
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grid();
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title('2D Sheet Imaginary Conductivity');
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ylabel('Conductivity (S/m)');
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if DISPLAY_HZ
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xlabel('Frequency (Hz)');
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else
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xlabel('Frequency (rads-1)');
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end
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