Density-waves instability and a skyrmion lattice on the surface of strong topological insulators

Yuval Baum, Ady Stern

Research output: Contribution to journalArticlepeer-review

Abstract

In this work we analyze the instability conditions for spin-density-wave (SDW) formation on the surface of strong topological insulators. We find that for a certain range of Fermi energies and strength of interactions the SDW state is favored compared to the unmagnetized and the uniform-magnetization states. We also find that the SDWs are of spiral nature and, for a certain range of parameters, a Skyrmion lattice may form on the surface. We show that this phase may have a nontrivial Chern number even in the absence of an external magnetic field.

Original languageEnglish
Article number195116
JournalPhysical Review B
Volume86
Issue number19
DOIs
StatePublished - 12 Nov 2012

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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