Alternative procedure to calculate the quantum Hall conductivity?
26 Jul
2024
26 Jul
'24
9:25 a.m.
Hello Kwant users, I have been trying to calculate the Hall conductivity in a time reversal broken Weyl semimetal (Weyl axis z) by using a 6terminal Hall bar geometry with two current leads along z and 4 voltage leads perpendicular to z and then injecting unit current through the left current lead and calculate the p.d. across the voltage leads by inverting the conductance matrix as shown in qhe.py. However, it seems for some cases in thin film systems (thin film along x), the conductance matrix is singular and I cannot get results. Is there an alternative way to calculate the Hall conductivity in this case where one does not need to invert the conductance matrix? Thanks in advance.
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