Quantum spin compass models in 2D electronic topological metasurfaces
Mesoscale and Nanoscale Physics
2021-10-13 v2 Strongly Correlated Electrons
Abstract
We consider a metasurface consisting of a square lattice of cylindrical antidots in a two-dimensional topological insulator (2DTI). Each antidot supports a degenerate Kramer's pair of eigenstates formed by the helical topological edge states. We show that the on-site Coulomb repulsion leads to the onset of the Mott insulator phase in the system in a certain range of experimentally relevant parameters. Intrinsic strong spin-orbit coupling characteristic for the 2DTI supports a rich class of the emerging low-energy spin Hamiltonians which can be emulated in the considered system, which makes it an appealing solid state platform for quantum simulations of strongly correlated electron systems.
Cite
@article{arxiv.2106.08606,
title = {Quantum spin compass models in 2D electronic topological metasurfaces},
author = {Fedor Nigmatulin and Ivan Shelykh and Ivan Iorsh},
journal= {arXiv preprint arXiv:2106.08606},
year = {2021}
}