Neutron scattering tests of the fluctuation-driven scalar spin chirality hypothesis

ORAL

Abstract

Non-coplanar magnetic textures with finite scalar spin chirality generate an emergent (real space Berry curvature) magnetic field that affects electronic transport. Skyrmion lattices are well-known example where scalar spin chirality generates the topological Hall effect (THE). Recently, there has been evidence of anomalous behavior in Hall conductivity that resembles the THE in magnetic textures with no static scalar spin chirality. This motivates a hypothesis that chirality can be generated dynamically by spin fluctuations. Here, we test the possibility of an emergent field driven by spin fluctuations in the transverse conical phase using a detailed magnetic model for the kagome metal ErMn6Sn6 derived from inelastic neutron scattering.

**This work is supported by the U.S. Department of Energy (U.S. DOE), Office of Basic Energy Sciences (BES), Division of Materials Sciences and Engineering, and the Center for Advancement of Topological Semimetals (CATS), an Energy Frontier Research Center funded by U.S. DOE, BES, through the Ames National Laboratory under Contract No. DE-AC02-07CH11358. This research used resources at the Spallation Neutron Source, which is a U.S. DOE Office of Science User Facility operated by the Oak Ridge National Laboratory.

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Presenters

  • Dhurba R Jaishi

    • Iowa State University

Authors

  • Dhurba R Jaishi

    • Iowa State University

  • Tianxiong Han

    • Ames National Laboratory

  • Bing Li

    • Oak Ridge National Laboratory

  • Tyler J Slade

    • Ames National Laboratory

  • Daniel M Pajerowski

    • Oak Ridge National Laboratory

  • Benjamin G. Ueland

    • Ames National Laboratory

  • Robert J McQueeney

    • Ames National Laboratory/Iowa State University
    • Iowa State University