Work

Account of electron scattering on many-particle clusters in strongly correlated systems. Electron spectra in the pairwise approximation in wannier and bloch representation

Year: 2024

Type: article

Abstract: A generalized method for calculating the electronic structure of disordered systems with strong electron correlations based on Green's functions is developed. It includes a recursive method for calculating the T-matrix of scattering on arbitrary many-particle clusters for the Green's function of the system, as well as the extension of this approach to the study of electronic spectra in both direct (Wannier) and reciprocal (Bloch) representations at a temperature of 0 K. The one-band Hubbard model and the correlated random field approximation are used. The small parameter of the cluster expansion is calculated. The distributions of the electronic states in the reciprocal (as well as in the direct) representation show sensitivity to the changes in the b.c.c. alloy properties and the resulting atomic and magnetic orders, which can be used as a basis for the analysis of experimental data, e.g. from positron spectroscopy, to study the defects.

Source: Physica B Condensed Matter

DOI: 10.1016/j.physb.2024.416849

Authors: Tetiana Shatnii, Evgen Len, Yevheniy Tsapko, Iryna Galstian, Tetiana Len

Institutions: G.V. Kurdyumov Institute for Metal Physics, Kyiv Academic University, Leibniz Institute for Solid State and Materials Research, National University "Kyiv Aviation Institute"

Language: Catalan

Topic: Physics of Superconductivity and Magnetism

Subfield: Condensed Matter Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $3,160

Funder: National Academy of Sciences of Ukraine