The two-dimensional quantum Heisenberg antiferromagnet with Ising-like anisotropy

Cuccoli, Alessandro; Tognetti, V.; Roscilde, Tommaso; Verrucchi, Paola; Vaia, Ruggero

doi:10.1590/s0103-97332000000400011

Cited by 3 publications

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“…The quantum phase diagram reported in Fig. 14 could be built up 87,89 in a simpler way starting from the knowledge of the classical one and using a relation that follows from the form of Eq. ( 37),…”

Section: A 2d Antiferromagnet With Easy-axis Anisotropymentioning

confidence: 99%

Quantum Heisenberg antiferromagnets: a survey of the activity in Florence (Review)

Balucani

Capriotti

Cuccoli

et al. 2005

Low Temperature Physics

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Over the years the research group in Firenze has produced a number of theoretical results concerning the statistical mechanics of quantum antiferromagnetic models, which range from the theory of two-magnon Raman scattering to the characterization of the phase transitions in quantum low-dimensional antiferromagnetic models. Our research activity was steadily aimed to the understanding of experimental observations.

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Section: A 2d Antiferromagnet With Easy-axis Anisotropymentioning

confidence: 99%

Quantum Heisenberg antiferromagnets: a survey of the activity in Florence (Review)

Balucani

Capriotti

Cuccoli

et al. 2005

Low Temperature Physics

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“…The 2D Heisenberg isotropic model don't provide any ordering for T > 0 K (Mermin-Wagner theorem). However, adding anisotropy we can change entire condition [9]. When applied to a square lattices, the Heisenberg antiferromagnetic anisotropic model predicts, at low temperature, a non-linearity in the M − H diagram and a soft peak at susceptibility.…”

Section: Introductionmentioning

confidence: 99%

Quantum anisotropic antiferromagnetic Heisenberg model for description of magnetic properties at low temperatures from KTb(WO4)2

Freitas

Silva

2023

Preprint

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Low dimensional magnetic systems have attracted the attention of several researchers in recentdecades, mainly because from exotic magnetic properties and the superconductivity that, in someof these systems, occur as result from characteristics of such materials. One of these materialsis KTb(WO4)2, generally considered a prototype from 2D Ising model, but which presents somepeculiarities on the magnetization diagram at low temperatures, especially the non-linear dependenceof magnetization with the applied magnetic field, behavior that cannot be described via puretwo-dimensional Ising model. The system presents structural and metamagnetic phase transition atlow temperatures, and we believe that such behavior may be related quantum effects and despitepresenting high anisotropy, this material it would not be a perfect prototype of the Ising model intwo dimensions. In this work, we present a proposal for using the anisotropic quantum Heisenbergmodel for describing the magnetic properties of the KTb(WO4)2 quasi-doublet with the objective,mainly, to describe non-linear properties at low temperatures. To achieve our goal, we simulatedthe magnetic properties of the material considering several anisotropy values via Quantum MonteCarlo (QMC) and compared the results with experimental data available already published. Tocomparison, we obtained diagrams of magnetization versus field and susceptibility dependence oftemperature (low temperature regime). Our results show excellent agreement with the experimentaldata, especially at low temperatures and for intermediate values from magnetic anisotropy.

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Quantum Anisotropic Antiferromagnetic Heisenberg Model for Description of Magnetic Properties at Low Temperatures from KTb(WO4)2

Freitas,

Silva,

Silva

2023

J Low Temp Phys

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The two-dimensional quantum Heisenberg antiferromagnet with Ising-like anisotropy

Cited by 3 publications

References 0 publications

Quantum Heisenberg antiferromagnets: a survey of the activity in Florence (Review)

Quantum Heisenberg antiferromagnets: a survey of the activity in Florence (Review)

Quantum anisotropic antiferromagnetic Heisenberg model for description of magnetic properties at low temperatures from KTb(WO4)2

Quantum Anisotropic Antiferromagnetic Heisenberg Model for Description of Magnetic Properties at Low Temperatures from KTb(WO4)2

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