title: Controlling the growth of multiple ordered heteromolecular phases by utilizing intermolecular repulsion.
abstract: Metal/organic interfaces and their structural, electronic, spintronic and thermodynamic properties have been investigated intensively, aiming to improve and develop future electronic devices. In this context, heteromolecular phases add new design opportunities simply by combining different molecules. However, controlling the desired phases in such complex systems is a challenging task. Here, we report an effective way of steering the growth of a bimolecular system composed of adsorbate species with opposite intermolecular interactions-repulsive and attractive, respectively. The repulsive species forms a two-dimensional lattice gas, the density of which controls which crystalline phases are stable. Critical gas phase densities determine the constant-area phase diagram that describes our experimental observations, including eutectic regions with three coexisting phases. We anticipate the general validity of this type of phase diagram for binary systems containing two-dimensional gas phases, and also show that the density of the gas phase allows engineering of the interface structure.
authors.affiliation: Peter Grünberg Institut (PGI-3), Forschungszentrum Jülich, 52425 Jülich, Germany.|Jülich Aachen Research Alliance (JARA)-Fundamentals of Future Information Technology, 52425 Jülich, Germany.
authors.forename: Caroline
authors.initials: C
authors.lastname: Henneke
authors.affiliation: Peter Grünberg Institut (PGI-3), Forschungszentrum Jülich, 52425 Jülich, Germany.|Jülich Aachen Research Alliance (JARA)-Fundamentals of Future Information Technology, 52425 Jülich, Germany.
authors.forename: Janina
authors.initials: J
authors.lastname: Felter
authors.affiliation: Peter Grünberg Institut (PGI-3), Forschungszentrum Jülich, 52425 Jülich, Germany.|Jülich Aachen Research Alliance (JARA)-Fundamentals of Future Information Technology, 52425 Jülich, Germany.
authors.forename: Daniel
authors.initials: D
authors.lastname: Schwarz
authors.affiliation: Peter Grünberg Institut (PGI-3), Forschungszentrum Jülich, 52425 Jülich, Germany.|Jülich Aachen Research Alliance (JARA)-Fundamentals of Future Information Technology, 52425 Jülich, Germany.
authors.forename: F
authors.initials: F
authors.lastname: Stefan Tautz
authors.affiliation: Peter Grünberg Institut (PGI-3), Forschungszentrum Jülich, 52425 Jülich, Germany.|Jülich Aachen Research Alliance (JARA)-Fundamentals of Future Information Technology, 52425 Jülich, Germany.
authors.forename: Christian
authors.initials: C
authors.lastname: Kumpf