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// Scilab Code Ex3.15: Page:140 (2011)
clc;clear;
e = 1.6e-019; // Energy equivalent of 1 eV, J/eV
k_B = 1.38e-023; // Boltzmann constant, J/K
f_E = 0.01;....// Probability that a state with energy 0.5 eV above the Fermi energy is occupied by an electron, eV
delta_E = 0.5; // Energy difference (E-Ef)of fermi energy, eV
// Since f_E = 1/(exp((E-Ef)/(k_B*T))+1), solvinf for T
T = delta_E/(log((1-f_E)/f_E)*k_B/e); // Temperature at which the level above the fermi level is occupied by the electron, K
printf("\nThe temperature at which the level above the fermi level is occupied by the electron = %4d K", ceil(T));
// Result
// The temperature at which the level above the fermi level is occupied by the electron = 1262 K
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