Valley polarization braiding in strained graphene
Mesoscale and Nanoscale Physics
2020-02-26 v1
Abstract
Previous works on deformed graphene predict the existence of valley-polarized states, however, optimal conditions for their detection remain challenging. We show that in the quantum Hall regime, edge-like states in strained regions can be isolated in energy within Landau gaps. We identify precise conditions for new conducting edges-like states to be valley polarized, with the flexibility of positioning them at chosen locations in the system. A map of local density of states as a function of energy and position reveals a unique braid pattern that serves as a fingerprint to identify valley polarization.
Cite
@article{arxiv.1909.12017,
title = {Valley polarization braiding in strained graphene},
author = {D. Faria and C. León and L. R. F. Lima and A. Latgé and N. Sandler},
journal= {arXiv preprint arXiv:1909.12017},
year = {2020}
}