Project Details
Projekt
Spin-orbit coupling and electronic correlation effects in epitaxial graphene studied by surface transport
Applicant
Professor Dr. Christoph Tegenkamp
Subject Area
Experimental Condensed Matter Physics
Term
since 2021
Project identifier
Deutsche Forschungsgemeinschaft (DFG) - Project number 449119662
Proximity coupling is a promising approach to modify and optimize the properties of 2D electron gases in graphene in a controlled manner. Taking into account hybridization, symmetry, doping and quasiparticle interactions, we will explore coupling to Rashba interface states, Mott phases, TMDCs and metallic quantum films using magneto- and nanotransport analysis complemented by correlative microscopy ((S)TEM, STM, SEM) and local spectroscopy (STS, EDX, EELS). Charge carrier mobilities are investigated as a function of carrier concentration and spin-orbit coupling by temperature-, contact distance- and magnetic field-dependent measurements, including interfacial structures and defects. The underlying scattering mechanisms at the 2D heterostructures, metal-insulator transitions and activation energies are analyzed in detail and compared with (time- and spin resolved) photoemission results. The determination of adsorption and intercalation sites will also serve as input for theoretical calculations. Besides analyzing various samples from our project partners, our work will focus on the adsorption and intercalation of Pb, Sn, In, Bi, organic molecules (e.g. MnPc) and van der Waals (vdW) films (e.g. WS2) on various single and bilayer graphene (nano)structures grown on insulating SiC substrates.
DFG Programme
Research Units
