Finding Structural Phase Transitions in Barlowite and Claringbullite

POSTER

Abstract

Barlowite (Cu4(OH)6FBr) and claringbullite (Cu4(OH)6FCl) are minerals related to the quantum spin liquid candidate herbertsmithite ZnCu3(OH)6Cl2, the popular S = ½ antiferromagnet with a geometrically perfect kagome lattice. The kagome lattices of claringbullite and barlowite are stacked perfectly on top of one another, separated by planes consisting of Cu2+ and halide ions, and show promise as QSL candidates. Both materials have a hexagonal crystal structure with P63/mmc symmetry and undergo temperature-dependent phase transitions to Pnma symmetry1. Previously we examined the barlowite transitions at 276 K1, but the claringbullite transition occurs much lower. To pinpoint the transition, equipment had to be modeled and aligned.

Chem. Commun., 2019,55,11587-11590

*We thank Dr. S. Winter for helpful discussions. APS Sector 15 is supported by the NSF Divisions of Chemistry and Materials Research under NSF/CHE-1346572. Use of the APS was supported under Contract No. DE-AC02-06CH11357. J.A.S. acknowledges support from the Independent Research/Development program while serving at the NSF. The NHMFL was supported by the NSF under DMR-1644779 and the State of Florida. A.H., L.D., and T.S. acknowledge funding from the NSF under DMR-1534818. H.I.R. thanks to the NHMFL for the internship.

Presenters

  • Hannah Revell

    • National High Magnetic Field Laboratory

Authors

  • Alyssa Henderson

    • Natl High Magnetic Field Lab
    • Florida State University

  • Lianyang Dong

    • Florida State University
    • University of California, Santa Barbara

  • Sananda Biswas

    • Goethe University Frankfurt
    • Institut für Theoretische Physik Goethe Universität Frankfurt am Main

  • Hannah Revell

    • National High Magnetic Field Laboratory

  • Yan Xin

    • National High Magnetic Field Laboratory
    • Natl High Magnetic Field Lab

  • John A Schlueter

    • National Science Foundation
    • Division of Materials Research, National Science Foundation
    • Division of Material Research, National Science Foundation

  • Roser Valenti

    • Goethe University Frankfurt
    • Intitut fur Theoretische Physik, Goethe-Universitat Frankfurt
    • Institute for Theoretical Physics, Goethe University Frankfurt
    • Institut für Theoretische Physik Goethe Universität Frankfurt am Main
    • Goethe-Universität Frankfurt

  • Theo Siegrist

    • Florida State Univ
    • National High Magnetic Field Laboratory
    • Natl High Magnetic Field Lab
    • Chemical and Biomedical Engineering, FAMU-FSU College of Engineering
    • National High Magnetic Field Laboratory, Florida State University, Tallahassee, FL, USA.; Department of Chemical and Biomedical Engineering, FAMU-FSU College of Engineering,