Simulating Spin Dynamics of Supersolid States in a Quantum Ising Magnet

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Détails bibliographiques
Auteurs principaux:	Xu, Yi, Hasik, Juraj, Ponsioen, Boris, Nevidomskyy, Andriy H.
Format:	Preprint
Publié:	2024
Sujets:	Strongly Correlated Electrons
Accès en ligne:	Acceder al recurso
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author	Xu, Yi Hasik, Juraj Ponsioen, Boris Nevidomskyy, Andriy H.
author_facet	Xu, Yi Hasik, Juraj Ponsioen, Boris Nevidomskyy, Andriy H.
contents	Motivated by a recent experimental study on the quantum Ising magnet $\text{K}_2\text{Co}(\text{SeO}_3)_2$ that presented spectroscopic evidence of zero-field supersolidity (Chen et al., arXiv:2402.15869), we simulate the excitation spectrum of the corresponding microscopic $XXZ$ model for the compound, using the recently developed excitation ansatz for infinite projected entangled-pair states. We map out the ground state phase diagram and compute the dynamical spin structure factors across a range of magnetic field strengths, focusing especially on the two supersolid phases found near zero and saturation fields. Our simulated excitation spectra for the zero-field supersolid "Y" phase are in excellent agreement with the experimental data - recovering the low-energy branches and integer quantized excited energy levels $ω_n=nJ_{zz}$. Furthermore, we demonstrate the nonlocal multi-spin-flip features for modes at $ω_2$, indicative of their multi-magnon nature. Additionally, we identify characteristics of the high-field supersolid "$Ψ$" phase in the simulated spectra, which should be compared with future experimental results.
format	Preprint
id	arxiv_https___arxiv_org_abs_2405_05151
institution	arXiv
publishDate	2024
record_format	arxiv
spellingShingle	Simulating Spin Dynamics of Supersolid States in a Quantum Ising Magnet Xu, Yi Hasik, Juraj Ponsioen, Boris Nevidomskyy, Andriy H. Strongly Correlated Electrons Motivated by a recent experimental study on the quantum Ising magnet $\text{K}_2\text{Co}(\text{SeO}_3)_2$ that presented spectroscopic evidence of zero-field supersolidity (Chen et al., arXiv:2402.15869), we simulate the excitation spectrum of the corresponding microscopic $XXZ$ model for the compound, using the recently developed excitation ansatz for infinite projected entangled-pair states. We map out the ground state phase diagram and compute the dynamical spin structure factors across a range of magnetic field strengths, focusing especially on the two supersolid phases found near zero and saturation fields. Our simulated excitation spectra for the zero-field supersolid "Y" phase are in excellent agreement with the experimental data - recovering the low-energy branches and integer quantized excited energy levels $ω_n=nJ_{zz}$. Furthermore, we demonstrate the nonlocal multi-spin-flip features for modes at $ω_2$, indicative of their multi-magnon nature. Additionally, we identify characteristics of the high-field supersolid "$Ψ$" phase in the simulated spectra, which should be compared with future experimental results.
title	Simulating Spin Dynamics of Supersolid States in a Quantum Ising Magnet
topic	Strongly Correlated Electrons
url	https://arxiv.org/abs/2405.05151

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