Bose-Einstein condensation of deconfined spinons in two dimensions
Abstract
The transition between the N\'{e}el antiferromagnet and the valence-bond solid state in two dimensions has become a paradigmatic example of deconfined quantum criticality, a non-Landau transition characterized by fractionalized excitations (spinons). We consider an extension of this scenario whereby the deconfined spinons are subject to a magnetic field. The primary purpose is to identify the exotic scenario of a Bose-Einstein condensate of spinons. We employ quantum Monte Carlo simulations of the \mbox{-} model with a magnetic field and perform a quantum field theoretic analysis of the magnetic field and temperature dependence of thermodynamic quantities. The combined analysis provides compelling evidence for the Bose-Einstein condensation of spinons and also demonstrates an extended temperature regime in which the system is best described as a gas of spinons interacting with an emergent gauge field.
Keywords
Cite
@article{arxiv.1909.01594,
title = {Bose-Einstein condensation of deconfined spinons in two dimensions},
author = {Adam Iaizzi and Harley D Scammell and Oleg P Sushkov and Anders W Sandvik},
journal= {arXiv preprint arXiv:1909.01594},
year = {2020}
}
Comments
Published in Phys. Rev. B March 11, 2020