Interface controlled electronic charge inhomogeneities in correlated heterostructures.
For heterostructures of ultrathin, strongly correlated copper-oxide films and dielectric perovskite layers, we predict inhomogeneous electronic interface states. Our study is based on an extended Hubbard model for the cuprate film. The interface is implemented by a coupling to the electron and phonon degrees of freedom of the dielectric oxide layer. We find that electronic ordering in the film is associated with a strongly inhomogeneous polaron effect. We propose to consider the interfacial tuning as a powerful mechanism to control the charge ordering in correlated electronic systems.
Pavlenko
Natalia
N
EP VI and Center for Electronic Correlations and Magnetism, Universität Augsburg, Universitätsstrasse 1, D-86135 Augsburg, Germany.
Kopp
Thilo
T