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  Possible Inversion Symmetry Breaking in the S=1/2 Pyrochlore Heisenberg Magnet

Hagymasi, I., Schafer, R., Moessner, R., & Luitz, D. J. (2021). Possible Inversion Symmetry Breaking in the S=1/2 Pyrochlore Heisenberg Magnet. Physical Review Letters, 126(11): 117204. doi:10.1103/PhysRevLett.126.117204.

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Hagymasi, Imre1, Author              
Schafer, Robin2, Author
Moessner, Roderich1, Author              
Luitz, David J.1, Author              
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1Max Planck Institute for the Physics of Complex Systems, Max Planck Society, ou_2117288              
2external, ou_persistent22              

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 Abstract: We address the ground-state properties of the long-standing and much-studied three-dimensional quantum spin liquid candidate, the S = 1/2 pyrochlore Heisenberg antiferromagnet. By using SU(2) density-matrix renormalization group (DMRG), we are able to access cluster sizes of up to 128 spins. Our most striking finding is a robust spontaneous inversion symmetry breaking, reflected in an energy density difference between the two sublattices of tetrahedra, familiar as a starting point of earlier perturbative treatments. We also determine the ground-state energy, E-0/N-sites = -0.490(6)J, by combining extrapolations of DMRG with those of a numerical linked cluster expansion. These findings suggest a scenario in which a finite-temperature spin liquid regime gives way to a symmetry-broken state at low temperatures.

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 Dates: 2021-03-182021-03-19
 Publication Status: Published in print
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Title: Physical Review Letters
  Abbreviation : Phys. Rev. Lett.
Source Genre: Journal
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Publ. Info: Woodbury, N.Y. : American Physical Society
Pages: - Volume / Issue: 126 (11) Sequence Number: 117204 Start / End Page: - Identifier: ISSN: 0031-9007
CoNE: https://pure.mpg.de/cone/journals/resource/954925433406_1