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Glide symmetry breaking and Ising criticality in the quasi-1D magnet CoNb(2)O(6)
We construct a microscopic spin-exchange Hamiltonian for the quasi–one-dimensional (1D) Ising magnet [Formula: see text] that captures detailed and hitherto-unexplained aspects of its dynamic spin structure factor. We perform a symmetry analysis that recalls that an individual Ising chain in this ma...
Autores principales: | , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
National Academy of Sciences
2020
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7568302/ https://www.ncbi.nlm.nih.gov/pubmed/32978298 http://dx.doi.org/10.1073/pnas.2007986117 |
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author | Fava, Michele Coldea, Radu Parameswaran, S. A. |
author_facet | Fava, Michele Coldea, Radu Parameswaran, S. A. |
author_sort | Fava, Michele |
collection | PubMed |
description | We construct a microscopic spin-exchange Hamiltonian for the quasi–one-dimensional (1D) Ising magnet [Formula: see text] that captures detailed and hitherto-unexplained aspects of its dynamic spin structure factor. We perform a symmetry analysis that recalls that an individual Ising chain in this material is buckled, with two sites in each unit cell related by a glide symmetry. Combining this with numerical simulations benchmarked against neutron scattering experiments, we argue that the single-chain Hamiltonian contains a staggered spin-exchange term. We further argue that the transverse-field–tuned quantum critical point in [Formula: see text] corresponds to breaking this glide symmetry, rather than an on-site Ising symmetry as previously believed. This gives a unified microscopic explanation of the dispersion of confined states in the ordered phase and quasiparticle breakdown in the polarized phase at high transverse field. |
format | Online Article Text |
id | pubmed-7568302 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | National Academy of Sciences |
record_format | MEDLINE/PubMed |
spelling | pubmed-75683022020-10-27 Glide symmetry breaking and Ising criticality in the quasi-1D magnet CoNb(2)O(6) Fava, Michele Coldea, Radu Parameswaran, S. A. Proc Natl Acad Sci U S A Physical Sciences We construct a microscopic spin-exchange Hamiltonian for the quasi–one-dimensional (1D) Ising magnet [Formula: see text] that captures detailed and hitherto-unexplained aspects of its dynamic spin structure factor. We perform a symmetry analysis that recalls that an individual Ising chain in this material is buckled, with two sites in each unit cell related by a glide symmetry. Combining this with numerical simulations benchmarked against neutron scattering experiments, we argue that the single-chain Hamiltonian contains a staggered spin-exchange term. We further argue that the transverse-field–tuned quantum critical point in [Formula: see text] corresponds to breaking this glide symmetry, rather than an on-site Ising symmetry as previously believed. This gives a unified microscopic explanation of the dispersion of confined states in the ordered phase and quasiparticle breakdown in the polarized phase at high transverse field. National Academy of Sciences 2020-10-13 2020-09-25 /pmc/articles/PMC7568302/ /pubmed/32978298 http://dx.doi.org/10.1073/pnas.2007986117 Text en Copyright © 2020 the Author(s). Published by PNAS. https://creativecommons.org/licenses/by-nc-nd/4.0/ https://creativecommons.org/licenses/by-nc-nd/4.0/This open access article is distributed under Creative Commons Attribution-NonCommercial-NoDerivatives License 4.0 (CC BY-NC-ND) (https://creativecommons.org/licenses/by-nc-nd/4.0/) . |
spellingShingle | Physical Sciences Fava, Michele Coldea, Radu Parameswaran, S. A. Glide symmetry breaking and Ising criticality in the quasi-1D magnet CoNb(2)O(6) |
title | Glide symmetry breaking and Ising criticality in the quasi-1D magnet CoNb(2)O(6) |
title_full | Glide symmetry breaking and Ising criticality in the quasi-1D magnet CoNb(2)O(6) |
title_fullStr | Glide symmetry breaking and Ising criticality in the quasi-1D magnet CoNb(2)O(6) |
title_full_unstemmed | Glide symmetry breaking and Ising criticality in the quasi-1D magnet CoNb(2)O(6) |
title_short | Glide symmetry breaking and Ising criticality in the quasi-1D magnet CoNb(2)O(6) |
title_sort | glide symmetry breaking and ising criticality in the quasi-1d magnet conb(2)o(6) |
topic | Physical Sciences |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7568302/ https://www.ncbi.nlm.nih.gov/pubmed/32978298 http://dx.doi.org/10.1073/pnas.2007986117 |
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