%0 Journal Article
%T Determinant quantum Monte Carlo study of exciton condensation in the bilayer Hubbard model
%A Louk Rademaker
%A Steve Johnston
%A Jan Zaanen
%A Jeroen van den Brink
%J Physics
%D 2013
%I arXiv
%R 10.1103/PhysRevB.88.235115
%X We studied the possibility of exciton condensation in a strongly correlated bilayer extended Hubbard model using Determinant Quantum Monte Carlo. To model both the onsite repulsion U and the interlayer interaction V we introduced a novel update scheme extending the standard Sherman-Morrison update. We observe that the sign problem increases dramatically with the inclusion of the interlayer interaction V, which prohibits at this stage a unequivocal conclusion regarding the presence of exciton condensation. However, enhancement of the interlayer tunneling results suggest that the strongest exciton condensation tendency lies around 10-20 % p/n-doping. Magnetic properties and conductivity turn out to be relatively independent of the interlayer interaction.
%U http://arxiv.org/abs/1310.0623v1