Dear all,
Can somebody please tell me that how can we determine the weak topological phase in a topological insulator in 3D?
Firstly, i calculated first Z2-index v_0, which comes out to be zero. but it has even no. of dirac cones, indicating that it may be a weak topological insulator. So, how can i determine the other three indices?
Whatever i read, i understood that we have to check Z2 for three different planes like (001) (011) and (111). Z2 for which plane comes out to be 1, that would be the corresponding weak topological phase. Suppose for (011) Z2 is 1, then (0;011) would be the weak topological phase. I don't know whether i am right or wrong.
Kindly correct me, if i am doing something wrong.
Thanks in advance!
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