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Phys Rev Lett. 2014 Jun 20;112(24):247601. Epub 2014 Jun 16.

Unfolding of vortices into topological stripes in a multiferroic material.

Author information

  • 1Rutgers Center for Emergent Materials and Department of Physics and Astronomy, Rutgers University, Piscataway, New Jersey 08854, USA.
  • 2Zernile Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands.
  • 3Condensed Matter Physics and Materials Science, Brookhaven National Laboratory, Upton, New York 11973, USA.
  • 4JEOL USA, Inc., Peabody, Massachusetts 01960, USA.

Abstract

Multiferroic hexagonal RMnO(3) (R=rare‚ÄČearths) crystals exhibit dense networks of vortex lines at which six domain walls merge. While the domain walls can be readily moved with an applied electric field, the vortex cores so far have been impossible to control. Our experiments demonstrate that shear strain induces a Magnus-type force pulling vortices and antivortices in opposite directions and unfolding them into a topological stripe domain state. We discuss the analogy between this effect and the current-driven dynamics of vortices in superconductors and superfluids.

PMID:
24996108
[PubMed]
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