Farnell, Damian J. J. ![]() |
Abstract
We study the ground-state (gs) phase diagram of the frustrated spin-12 J1–J2–J3 antiferromagnet with J2=J3=κJ1 on the honeycomb lattice using coupled-cluster theory and exact diagonalization methods. We present results for the gs energy, magnetic order parameter, spin-spin correlation function, and plaquette valence-bond crystal (PVBC) susceptibility. We find a Néel antiferromagnetic (AFM) phase for κ<κc1≈0.47, a collinear striped AFM phase for κ>κc2≈0.60, and a paramagnetic PVBC phase for κc1≲κ≲κc2. The transition at κc2 appears to be of first-order type, while that at κc1 is continuous. Since the Néel and PVBC phases break different symmetries our results favor the deconfinement scenario for the transition at κc1.
Item Type: | Article |
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Date Type: | Publication |
Status: | Published |
Schools: | Dentistry |
Subjects: | Q Science > QC Physics |
Publisher: | American Physical Society |
ISSN: | 1098-0121 |
Last Modified: | 04 Jan 2024 08:38 |
URI: | https://orca.cardiff.ac.uk/id/eprint/59342 |
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