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Pseudo-transition between antiferromagnetic and charge orders in a minimal spin-pseudospin model of one-dimensional cuprates

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  • Jozef Strečka

    (P. J. Šafárik University)

  • Katarína Karl’ová

    (CY Cergy Paris Université)

Abstract

This study rigorously investigates the phenomenon of a pseudo-transition in a minimal spin-pseudospin model, serving as a simplified model of one-dimensional cuprate chains [CuO] $$_\infty $$ ∞ , by making use of the transfer-matrix method. The studied spin-pseudospin model of one-dimensional cuprate chains [CuO] $$_\infty $$ ∞ reveals a peculiar pseudo-transition between a charged-ordered phase and an antiferromagnetic phase, which is accompanied with anomalous behavior of magnetic and thermodynamic quantities. While the entropy and short-range correlations undergo near the pseudo-transition steep continuous changes reminiscent of a discontinuous phase transition, the specific heat displays a sizable sharp peak akin to a continuous phase transition. Graphic Abstract A density plot of the specific heat of one-dimensional spin-pseudospin model of cuprate chain in the inter-site interaction versus temperature plane, which serves as a pseudo-phase diagram involving charged-ordered (CO) and antiferromagnetic (AF) phases

Suggested Citation

  • Jozef Strečka & Katarína Karl’ová, 2024. "Pseudo-transition between antiferromagnetic and charge orders in a minimal spin-pseudospin model of one-dimensional cuprates," The European Physical Journal B: Condensed Matter and Complex Systems, Springer;EDP Sciences, vol. 97(6), pages 1-8, June.
    • Handle: RePEc:spr:eurphb:v:97:y:2024:i:6:d:10.1140_epjb_s10051-024-00710-7
    DOI: 10.1140/epjb/s10051-024-00710-7
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    1. Krokhmalskii, Taras & Hutak, Taras & Rojas, Onofre & de Souza, Sergio Martins & Derzhko, Oleg, 2021. "Towards low-temperature peculiarities of thermodynamic quantities for decorated spin chains," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 573(C).
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