10.17632/Y9DS5NNM2F.1
Gao, Jiacheng
Jiacheng
Gao
Irvsp: To obtain irreducible representations of electronic states in the VASP
Mendeley
2021
Dataset
Condensed Matter Physics
FOS: Physical sciences
FOS: Physical sciences
Computational Physics
Wu, Quansheng
Quansheng
Wu
Persson, Clas
Clas
Persson
Wang, Zhijun
Zhijun
Wang
2021-01-28
10.1016/j.cpc.2020.107760
10.17632/y9ds5nnm2f
GNU Lesser General Public License
We present an open-source program irvsp, to compute irreducible representations of electronic states for all 230 space groups with an interface to the Vienna ab-initio Simulation Package. This code is fed with plane-wave-based wavefunctions (e.g. WAVECAR) and space group operators (listed in OUTCAR), which are generated by the VASP package. This program computes the traces of matrix presentations and determines the corresponding irreducible representations for all energy bands and all the k-points in the three-dimensional Brillouin zone. It also works with spin–orbit coupling (SOC), i.e., for double groups. It is in particular useful to analyze energy bands, their connectivities, and band topology, after the establishment of the theory of topological quantum chemistry. Accordingly, the associated library – irrep_bcs.a – is developed, which can be easily linked to by other ab-initio packages. In addition, the program has been extended to orthogonal tight-binding (TB) Hamiltonians, e.g. electronic or phononic TB Hamiltonians. A sister program ir2tb is presented as well.