Figure 10

ZT max as a function of the device length for the case of a larger ribbon with M = 11. The open symbols and solid lines are numerical data and fitting curves for the case of 50% isotope doping and 5% vacancies in the m = 6 line. The filled symbol is the numerical results of the device with 50% isotope doping and 5% vacancies in lines m = 3, 6, 9.