Averievite: A copper oxide kagome antiferromagnet

A. S. Botana, H. Zheng, S. H. Lapidus, J. F. Mitchell, and M. R. Norman
Phys. Rev. B 98, 054421 – Published 21 August 2018

Abstract

Averievite, Cu5V2O10(CsCl), is an oxide mineral composed of Cu2+ kagome layers sandwiched by Cu2+V5+ honeycomb layers. We have synthesized this oxide and investigated its properties from ab initio calculations along with susceptibility and specific heat measurements. The data indicate a Curie-Weiss temperature of 185 K as well as long-range magnetic order at 24 K due to the significant interlayer coupling from the honeycomb copper ions. This order is suppressed by substituting copper by isoelectronic zinc, suggesting that Zn-substituted averievite is a promising spin liquid candidate. A further proposed substitution that replaces V5+ by Ti4+ not only dopes the material but is predicted to give rise to a two-dimensional electronic structure featuring Dirac crossings. As such, averievite is an attractive platform for S=1/2 kagome physics with the potential for realizing novel electronic states.

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  • Received 24 August 2017
  • Revised 7 July 2018

DOI:https://doi.org/10.1103/PhysRevB.98.054421

©2018 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

A. S. Botana1,*, H. Zheng1, S. H. Lapidus2, J. F. Mitchell1, and M. R. Norman1,†

  • 1Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
  • 2X-ray Science Division, Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439, USA

  • *Corresponding author: antiasanchezbot@gmail.com
  • norman@anl.gov

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Issue

Vol. 98, Iss. 5 — 1 August 2018

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