I want to calculate thermoelectric properties of a 2D material by calculating its electron transmission without considering the phononic part. Because for phonon transmission calculation, we have to first design a device configuration and for that very high computational resources are required. Now after calculating the electron transmission calculatuions and viewing the results in the virtual nano lab we are getting various thermoelectric coefficients except ZT which is showing to be Nil. However in the plot, I am obtaining the variation of ZT with respect to energy. So I have doubrt regarding this ZT plot as to where these values are arising from when the value of ZT shown in the nano lab is nil.