FOR 5242:  Proximity-induced correlation effects in low dimensional systems

• Subject Area: Physics
• Term: since 2021
• Website: Homepage
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 449119662

Inducing correlation effects in low dimensional electron gases by proximity coupling is a powerful concept for the design of new quantum materials with tailored electronic, magnetic and optical properties. In this Research Unit the proximity effect of spin-orbit interaction, electronic correlations as well as local electric fields with 2D electron gas systems is investigated using the example of epitaxial graphene (EG) on SiC substrates. Epitaxial graphene (EG) in form for mono- and bilayer systems resembles a truly 2D electron system and is known for its ability of manifold and flexible functionalization schemes at its vacuum and interface site, e.g. by charge transfer, polarization doping, encapsulation with high-Z materials as well as formation of reconstructions and superlattices. The controlled transition from linear to flat bands in EG as well as the coupling of functionalized EG to 2D electron gases at the interface will open the corridor for tailoring electronic correlation effects and mesoscopic phenomena in 2D materials, e.g. superconductivity, spin and charge density waves, Mott states, new magnetic phases as well as QHE and Klein tunneling. Within this Research Unit, all relevant fields of growth, atomic structure, electronic structure and transport as well as the theoretical modeling of the interfaces and atomistic processes are covered by the expertise of the PIs within this consortium.

• DFG Programme: Research Units
• International Connection: Netherlands, Sweden

Projects

• Coordination Funds (Applicant Tegenkamp, Christoph )
• Electronic correlations in functionalized graphene on SiC (Applicant Wehling, Tim )
• Modeling of emergent features in functionalized epitaxial graphene (Applicant Gemming, Sibylle )
• Non-equilibrium carrier dynamics and band structure of proximity-coupled graphene (Applicant Gierz-Pehla, Isabella )
• Proximity doping effects in epitaxial graphene: substrate, growth and post-growth treatment (Applicant Pierz, Klaus )
• Proximity doping effects in epitaxial graphene: substrate, growth and post-growth treatment (Applicants Stosch, Rainer ;  Tschirner, Teresa )
• Proximity induced superconductivity in graphene on SiC by intercalation (Applicants Schädlich, Philip ;  Seyller, Thomas )
• Spin-orbit coupling and electronic correlation effects in epitaxial graphene studied by surface transport (Applicant Tegenkamp, Christoph )
• Structure and proximity effects in (twisted) multilayer graphene (Applicants Kumpf, Christian ;  Lüpke, Felix )
• Tailoring the electronic structure of epitaxial graphene on SiC (Applicant Küster, Kathrin )
• Transport properties of intercalated graphene on the atomic scale (Applicant Wenderoth, Martin )

• Spokesperson: Professor Dr. Christoph Tegenkamp