Figure 4: (a) The band gap, as a function of the tolerance values for a super cell. is number of total bands for the super cell. The parameters are the same as Figure 3 without considering the fabrication errors. After taking the fabrication errors into consideration, we repeat 100 times calculations for each tolerance values. The numerical results show that the gap equals zero; i.e., Weyl points exist for the tolerance values less than 30%. Exceeding this value, the gap opens by the fabrication errors. (b) The band dispersions along the line crossing two Weyl points for a super cell with tolerance values on the capacitors.