Magnetic order on a topological insulator surface with warping and proximity-induced superconductivity
Daniel Mendler, Panagiotis Kotetes, Gerd Schön
DOI 10.1103/PhysRevB.91.155405 · Physical Review B
Active bibliographic source — not scientific approval
Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.
Abstract
We determine the nature of the magnetic order on the surface of a topological insulator (TI) which develops due to hexagonal warping and the resulting Fermi surface (FS) nesting in the presence of a repulsive Hubbard interaction. For this purpose we investigate the spin susceptibility and derive a Landau theory to compare the different accessible phases. For a nearly hexagonal FS and sufficiently strong interaction the magnetic ground state is formed by a skyrmion lattice, i.e., by a superposition of three helical spin density waves which preserves C3 symmetry. The magnetic ground state is topologically nontrivial with a nonzero skyrmion charge, which can be stabilized and controlled by an applied magnetic field. By bringing the TI in proximity to a conventional superconductor one can engineer a C3-symmetric topological superconductor. We explore the modification of the phase diagram as well as the mutual influence between the skyrmion structure and a multipolar distribution of supercurrents, which can provide information about the underlying skyrmion charge.
Similar papers
Skyrmion spin texture in ferromagnetic semiconductor-superconductor heterostructures
similarity 0.88Kristofer Björnson & Annica M. Black-Schaffer · 2013 · arXiv:1309.3411
Source status unknown — claims are unverified
Meissner currents induced by topological magnetic textures in hybrid superconductor/ferromagnet structures
similarity 0.87Samme M. Dahir et al.
Source status unknown — claims are unverified
Mutual Interaction between Superconductors and Ferromagnetic Skyrmionic Structures in Confined Geometries
similarity 0.87Leonardo González-Gómez et al.
Source status unknown — claims are unverified
Proximity-Induced Odd-Frequency Superconductivity in a Topological Insulator
similarity 0.87Jonas A. Krieger et al.
Source status unknown — claims are unverified
Magnetic-Field-Induced Topological Reorganization of a P-wave Superconductor
similarity 0.87Mercaldo, Maria Teresa et al. · 2016 · arXiv:1607.03539
Source status unknown — claims are unverified
Superconducting proximity effect through a magnetic domain wall
similarity 0.87Alexander Konstandin et al.
Source status unknown — claims are unverified