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Frustrated magnetism and resonating valence bond physics in two-dimensional kagome-like magnets

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posted on 2018-08-13, 14:15 authored by Ioannis RousochatzakisIoannis Rousochatzakis, R. Moessner, Jeroen van den Brink
We explore the phase diagram and the low-energy physics of three Heisenberg antiferromagnets which, like the kagome lattice, are networks of corner-sharing triangles but contain two sets of inequivalent short-distance resonance loops. We use a combination of exact diagonalization, analytical strong-coupling theories, and resonating valence bond approaches, and scan through the ratio of the two inequivalent exchange couplings. In one limit, the lattices effectively become bipartite, while at the opposite limit heavily frustrated nets emerge. In between, competing tunneling processes result in short-ranged spin correlations, a manifold of low-lying singlets (which can be understood as localized bound states of magnetic excitations), and the stabilization of valence bond crystals with resonating building blocks.

History

School

  • Science

Department

  • Physics

Published in

Physical Review B - Condensed Matter and Materials Physics

Volume

88

Issue

19

Citation

ROUSOCHATZAKIS, I., MOESSNER, R. and VAN DEN BRINK, J., 2013. Frustrated magnetism and resonating valence bond physics in two-dimensional kagome-like magnets. Physical Review B, 88 (19), 195109.

Publisher

© American Physical Society

Version

  • AM (Accepted Manuscript)

Publisher statement

This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/

Publication date

2013

Notes

This paper was published in the journal Physical Review B and the definitive published version is available at https://doi.org/10.1103/PhysRevB.88.195109.

ISSN

2469-9950

eISSN

2469-9969

Language

  • en

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