Signatures of novel spin phases in thermal conductivity of the chiral skyrmion material Cu<sub>2</sub>OSeO<sub>3</sub>

ORAL

Abstract

We report measurements of thermal conductivity (κ) as a function of magnetic field in single crystals of the chiral skyrmion material Cu2OSeO3 in the temperature range 0.5 K ≤ T ≤ 15 K. Traversing phase boundaries associated with the low-temperature skyrmion and tilted conical spin phases, recently identified in small-angle neutron scattering studies,a,b gives rise to sharp signatures in κ(H) for H ||〈100〉that are attributed to changes in the magnon thermal conductivity. Different crystallographic orientations for the applied field and heat flow will be discussed.

a A. Chacon et al., Nature Phys. 14, 936 (2018).

b F. Qian et al., Sci. Adv. 3, 7323 (2018).

*This material is based on work supported by the U.S. DOE, Off. of BES, Div. of Mater. Sci. and Eng., under grant No. DE-SC0008607 (UM). Work at JHU was supported as part of the Institute for Quantum Matter, an Energy Frontier Research Center funded by the U.S. DOE,
Off. of Sci., Off. of BES, under Award Number DE-SC0019331, and the NSF, Div. of Mater. Res., Sol. St. Chem., CAREER grant No. DMR-1253562.

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Presenters

  • Artem Akopyan

    • University of Miami

Authors

  • Artem Akopyan

    • University of Miami

  • Narayan Prasai

    • University of Miami
    • Physics, University of Miami

  • Benjamin Trump

    • Johns Hopkins University

  • Guy G. Marcus

    • Johns Hopkins University

  • Sunxiang Huang

    • University of Miami

  • Tyrel McQueen

    • Johns Hopkins University
    • Johns Hopkins Univ
    • Institute for Quantum Matter, Johns Hopkins University
    • Henry A. Rowland Department of Physics and Astronomy, Johns Hopkins University

  • Joshua Cohn

    • University of Miami
    • Physics, University of Miami