Spatially-indirect Exciton Condensate Phases in Double Bilayer Graphene
Materials Science
2017-01-25 v1
Abstract
We present a theory of spatially indirect exciton condensate states in systems composed of a pair of electrically isolated Bernal graphene bilayers. The ground state phase diagram in a two-dimensional displacement-field/inter-bilayer-bias space includes layer-polarized semiconductors, spin-density-wave states, exciton condensates, and states with mixed excitonic and spin order. We find that two different condensate states, distinguished by a chirality index, are stable under different electrical control conditions.
Keywords
Cite
@article{arxiv.1611.06410,
title = {Spatially-indirect Exciton Condensate Phases in Double Bilayer Graphene},
author = {Jung-Jung Su and Allan H. MacDonald},
journal= {arXiv preprint arXiv:1611.06410},
year = {2017}
}
Comments
15 pages, 20 figures