Density Waves Instability and a Skyrmion Lattice on the Surface of Strong Topological Insulators
arXiv:1208.2576 · doi:10.1103/PhysRevB.86.195116
Abstract
In this work we analyze the instability conditions for spin-density-waves (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 SDW 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 non trivial Chern-number even in the absence of an external magnetic field.
6 pages, 7 figures
References in corpus (6)
- Superconducting proximity effect and Majorana fermions at the surface of a topological insulator
- Topological Field Theory of Time-Reversal Invariant Insulators
- First direct observation of Spin-textures in Topological Insulators : Spin-resolved ARPES as a probe of topological quantum spin Hall effect and Berry's phase
- Exciton condensation and charge fractionalization in a topological insulator film
- Fractional topological insulators in three dimensions
- Spin Susceptibility and Helical Magnetic Orders at the Edges/Surfaces of Topological Insulators Due to Fermi Surface Nesting