“…The coefficients N s , P s , and K s depend upon the concentrations n and p. Since we investigate the case of a linear approximation, then these parameters we take at an equilibrium temperature T 0 and at equilibrium concentrations, n n, p 0 and p n, p 0 . Comparison of the value of K s with the obtained earlier boundary conditions [12,27] allows one to conclude that K s is the surface thermal conductivity [28].…”