XXIX International Symposium "Nanophysics and Nanoelectronics", Nizhny Novgorod, March 10-14, 2025
Carbon and van der Waals materials

Modified Monte Carlo method with thermostat algorithm for model orthonickelates

V. S. Ryumshin^a, Yu. D. Panov^a, V. A. Ulitko^a, A. S. Moskvin<sup>ab

a</sup> Institute of Natural Sciences and Mathematics, Ural Federal University
^b Institute of Metal Physics, Ural Branch of the Russian Academy of Sciences, Ekaterinburg

Abstract: The results of numerical simulation using a modified Monte Carlo method with a thermostat algorithm for a pseudospin model of rare-earth orthonickelates are presented. Temperature phase diagrams are constructed for various degrees of filling and for various parameters of the model, and the effect of local correlations on the critical temperatures of the model orthonickelate is investigated. The possibility of detecting phase inhomogeneous states is shown. The numerical simulation results show good qualitative agreement with the analytical results in the mean field approximation.

Keywords: rare-earth orthonickelates, Monte-Carlo, mean field approximation.

Received: 06.03.2025
Revised: 06.03.2025
Accepted: 05.05.2025

DOI: 10.61011/FTT.2025.07.61199.28HH-25

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