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All Journal International Journal of Computing Science and Applied Mathematics
Mineo Saito
Faculty of Mathematics and Physics, Institute of Science and Technology, Kanazawa University, Kanazawa
Computer Science & IT Education Mathematics

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Applications of Double Group Theory in 2D Materials Muhammad Yusuf Hakim Widianto; Mineo Saito
(IJCSAM) International Journal of Computing Science and Applied Mathematics Vol 9, No 2 (2023)
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j24775401.v9i2.19206

Abstract

Group theory is a fundamental mathematical frame- work valuable for analyzing the band structures in materials science. The hexagonal structures have unique electronic struc- tures, especially in 2D materials in group-IV, where the system is observed as the topological insulator. Meanwhile, in the case of group-V, it is semiconductors. This paper analyzes group- IV and group-V band structures based on group theory and proposes a method to identify the irreducible representation (IR) in symmorphic systems. It is found that all materials in group- IV are topological insulators. The evaluation of Z2 invariant v in group-V found that the phosphorene and bismuthene cases are v = 0 and v = 1, respectively, and belong to trivial and topological insulator materials for phosphorene and bismuthene, respectively.
Co-Authors Muhammad Yusuf Hakim Widianto