Vortex Crystals with Chiral Stripes in Itinerant Magnets

DOI DOI Web Site 被引用文献59件 参考文献28件 オープンアクセス
  • Ryo Ozawa
    Department of Applied Physics, University of Tokyo, Bunkyo, Tokyo 113-8656, Japan
  • Satoru Hayami
    Department of Physics, Hokkaido University, Sapporo 060-0810, Japan
  • Kipton Barros
    Theoretical Division and CNLS, Los Alamos National Laboratory, Los Alamos, NM 87545, U.S.A.
  • Gia-Wei Chern
    Department of Physics, University of Virginia, Charlottesville, VA 22904, U.S.A.
  • Yukitoshi Motome
    Department of Applied Physics, University of Tokyo, Bunkyo, Tokyo 113-8656, Japan
  • Cristian D. Batista
    Department of Physics and Astronomy, University of Tennessee, Knoxville, TN 37996, U.S.A.

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説明

We study noncoplanar magnetic ordering in frustrated itinerant magnets. For a family of Kondo square lattice models with classical local moments, we find that a double-$Q$ noncoplanar vortex crystal has lower energy than the single-$Q$ helical order expected from the Ruderman-Kittel-Kasuya-Yosida interaction whenever the lattice symmetry dictates four global maxima in the bare magnetic susceptibility. By expanding in the small Kondo exchange and the degree of noncoplanarity, we demonstrate that this noncoplanar state arises from a Fermi surface instability, and it is generic for a wide range of electron filling fractions whenever the two ordering wave vectors connect independent sections of the Fermi surface.

5 pages, 4 figures

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