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Skyrmions and Electric Fields in Insulating Materials

  • Shinichiro Seki
  • Masahito Mochizuki
Chapter
  • 1.5k Downloads
Part of the SpringerBriefs in Physics book series (SpringerBriefs in Physics)

Abstract

In insulating materials, conduction electrons and associated emergent fields are absent; instead, magnetic skyrmions in insulators induce spatially inhomogeneous charge distributions through the relativistic spin-orbit interaction. Depending on the symmetry of an underlying crystallographic lattice, skyrmions carry electric dipoles or quadrupoles and can be manipulated by an external electric field. This property may provide an energetically more efficient method to control skyrmions because the electric field in an insulating system causes only negligible Joule heat loss compared with the current-driven approach in a metallic system. In this chapter, this magnetoelectric nature of skyrmions is discussed. Skyrmions also show resonant oscillation against both ac magnetic and electric fields of gigahertz frequency. The interference of these excitations causes unique optical responses called directional dichroism, where the sign reversal of light (microwave) propagation direction gives different absorption spectra.

Keywords

Faraday Rotation Spin Texture Electric Charge Distribution Crystallographic Unit Cell Inverse Faraday Effect 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer International Publishing Switzerland 2016

Authors and Affiliations

  • Shinichiro Seki
    • 1
  • Masahito Mochizuki
    • 2
  1. 1.Center for EmergentMatter Science (CEMS)RIKENWakoJapan
  2. 2.Department of Physics and MathematicsAoyama Gakuin UniversitySagamiharaJapan

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