Photonic emulation of two-dimensional materials with antiferromagnetic order
Abstract
We introduce an electromagnetic metamaterial - a spin-valley photonic topological insulator (SV-PTI) - that emulates a wide class of theoretically predicted gapped two-dimensional materials with antiferromagnetic order coupled to the valley degree of freedom. First-principles electromagnetic simulations and an analytic model reveal that a single parameter controls the propagation properties of the chiral states at the domain wall between two SV-PTIs: their group velocity, polarization, and the existence/absence of topological protection. The latter is determined by the geometry of the line of the least frequency separation between the bandgap-forming propagation bands. Topologically-protected compression of electromagnetic energy via group velocity control is enabled by SV-PTIs.
Keywords
Cite
@article{arxiv.1809.02819,
title = {Photonic emulation of two-dimensional materials with antiferromagnetic order},
author = {Ran Gladstein Gladstone and Minwoo Jung and Yuchen Han and Gennady Shvets},
journal= {arXiv preprint arXiv:1809.02819},
year = {2019}
}