Z2-support-OpenMX

This page supports to use our code, "Z2FH" in OpenMX 3.9. Z2FH computes $Z_{2}$ invariant by Berry curvature $F$ and Berry connection ${\bf A}$ [1,2]. This code is included in OpenMX3.9's source. It can compute the system broken space inversion symmetry, so this is suitable for computing $Z_{2}$ invariant of the system in the electric field or polar materials etc. Please cite the following article:

1. H. Sawahata, N. Yamaguchi, H. Kotaka and F. Ishii, Jpn. J. Appl. Phys. 57, 030309 (2018).
2. H. Sawahata, N. Yamaguchi and F. Ishii, Appl. Phys. Express 12, 075009 (2019).

Manual

Please see the OpenMX3.9's manual.

Examples

Please see Z2examples.

References

1. T. Fukui and Y. Hatsugai, J. Phys. Soc. Jpn. 76, 053702 (2007).
2. W. Feng, J. Wen, J. Zhou, D. Xiao, and Y. Yao, Comput. Phys. Commun. 183, 1849 (2012).