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

Abstract

This study rigorously investigates the phenomenon of a pseudo-transition in a minimal spinpseudospin model, serving as a simplified model of one-dimensional cuprate chains [CuO]n, by making use of the transfer-matrix method. The studied spin-pseudospin model of one-dimensional cuprate chains [CuO]n 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.

7 pages, 9 figures

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Cited by in corpus (7)

• Unusual low-temperature behavior in the half-filled band of the one-dimensional extended Hubbard model in atomic limit
• Pseudotransitions in a dilute Ising chain
• Bifurcation in correlation length of the Ising model on a "Toblerone" lattice
• Dual thermal pseudocritical features in a spin-1/2 Ising chain with twin-diamond geometry
• Quantum Otto engine mimicking Carnot near pseudotransitions in the one-dimensional extended Hubbard model in the atomic limit
• Spectral mechanism and nearly reducible transfer matrices for pseudotransitions in one-dimensional systems
• Thermodynamic constraints and pseudotransition behavior in a one-dimensional water-like system