Abstract
The electronic structure of the recently synthesized compounds La3T4As4O2 (T = Ni, Cu) are studied using the ab initio APW + lo method. A careful analysis of band structures and Fermi surfaces via the Local Density Approximation (LDA), the Generalized Gradient Approximation (GGA), and with the on-site Hubbard Ueff parameter (LDA/GGA + U) was performed. Calculations show that the GGA perfectly reproduces the ground state properties such as lattice constants, internal parameters, interatomic distances, angles, band structures and Fermi surfaces. The relationship between the 1111 and 122 structure types and 3442 structure is indicated and discussed. The GGA calculations show that the lattice constants (a0 and c0) satisfy the inter-growth conditions of the 3442 structure. We found a topological similarity between the Fermi surfaces of Ni-3442 and Ni-1111 systems, which respect the five-band model.
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This work was supported by the Algerian Directorate-General for Scientific Research and Technological Development (DGRSDT).
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Bendeddouche, Z., Zaoui, A., Kacimi, S. et al. Electronic Structure of Transition-Metal Pnictide Oxides La3T4As4O2 (T = Ni, Cu) from Ab Initio Calculations. Jetp Lett. 111, 210–217 (2020). https://doi.org/10.1134/S0021364020040013
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DOI: https://doi.org/10.1134/S0021364020040013