The first phase of the SPP 2244 started on Oct. 01, 2020 and will thus conclude on Sept. 30, 2023. Due to the pandemic situation there will be an extension of the first phase by 6 months until March 31, 2024. The second phase will then start on April 01, 2024 . The deadline for submitting project proposals will be July 01, 2023. The review colloquium for the project of the second funding period will take place from October 29 to October 31, 2023, at Physikzentrum Bad Honnef.
Two-dimensional (2D) materials are crystals with a thickness of only one or very few atoms. After the discovery of graphene, the most prominent representative of this class of materials, many other 2D crystals have been identified, often with intriguing properties that have no counterparts in three-dimensional solids.
Furthermore, stacking 2D crystals in a well-defined manner can result in new states of matter, even if the individual layers are only weakly bound by van der Waals (vdW) interaction. The most striking example, published in 2018, is the transformation of bilayer graphene into a superconductor if the layers are twisted by a “magic angle” of about 1.1 degree. Such a delicate structure manipulation has become possible thanks to the massive research efforts in graphene-related materials, and opens the door to the investigation of phase transitions imposed by the so-called proximity effect, for example between Mott insulator and unconventional superconducting state, to a 2D ferromagnetic phase, or semiconductor-metal transitions. In addition, vdW heterostructures offer rich optical and optoelectronic properties, such as interlayer excitons and trions. The combination of 2D crystals with different properties, e.g. a 2D superconductor and a 2D topological insulator, may open the door to exotic physical phenomena such as Majorana fermions. The goal of the Priority Programme is to bundle the research efforts and expertise in the German scientific community to address the many open fundamental questions of stacked 2D materials.
Prof. Dr. Jaroslav Fabian, University of Regensburg, Theoretical Physics
Prof. Dr. Janina Maultzsch, FAU Erlangen-Nürnberg, Solid-state Physics
Prof. Dr. Christoph Stampfer, RWTH Aachen, Solid-state Physics
Prof. Dr. Ursula Wurstbauer, University of Münster, Solid-state Physics
Prof. Dr. Thomas Heine (coordinator), TU Dresden, Theoretical Chemistry
M.Sc. Hossein Ostovar (student representative), University of Münster, Solid-state Physics