Correction of the Fan factor

The theory of Fan describes the thermally provoked shift of the energy bandgap of semiconductors. Part of the theory is the Fan factor, which depends on the microscopic material parameters, such as the dielectric constants and effective masses. Herein, employing data of GaP, we show that the originally published Fan factor was missing one multiplicative numerical factor, which turned out to be the high frequency dielectric constant.The theory of Fan describes the thermally provoked shift of the energy bandgap of semiconductors. Part of the theory is the Fan factor, which depends on the microscopic material parameters, such as the dielectric constants and effective masses. Herein, employing data of GaP, we show that the originally published Fan factor was missing one multiplicative numerical factor, which turned out to be the high frequency dielectric constant.