Field-induced Peierls phase in $S=1$ Heisenberg spins coupled to quantum phonons
Abstract
Spin-Peierls transition occurs in a one-dimensional Heisenberg antiferromagnetic model with single-ion anisotropy, coupled to finite frequency bond phonons, in a magnetic field. Our results indicate that for the pure Heisenberg model, any Peierls transition is suppressed by quantum fluctuations of the phonon field. However, a novel magnetic field-induced Spin-Peierls phase is realized in the presence of strong single-ion anisotropy. Contrary to the standard Peierls state, the periodicity of bond strength modulation in this field-induced Spin-Peierls state is variable and depends on the strength of the applied field. The nature of the ground state in this new phase and the associated field-driven transitions to and out of this phase are explored using extensive numerical simulations. In particular, we explore the spin and bond correlations and the evolution of bond order modulation with varying magnetic field.
Keywords
Cite
@article{arxiv.2404.06875,
title = {Field-induced Peierls phase in $S=1$ Heisenberg spins coupled to quantum phonons},
author = {Shifeng Cui and Wenan Guo and G. G. Batrouni and Pinaki Sengupta},
journal= {arXiv preprint arXiv:2404.06875},
year = {2024}
}