Coordination Funds

通过邻近耦合在低维电子气体中诱导相关效应是设计具有定制电子、磁性和光学性质的新型量子材料的一个强有力的概念。本研究单元以SiC衬底上的外延石墨烯为例，研究了自旋轨道相互作用、电子相关以及二维电子气体系统的局部电场的邻近效应。外延石墨烯（EG）类似于一个真正的二维电子系统，以其在真空和界面位置具有多种灵活的功能化方案的能力而闻名，例如通过电荷转移，极化掺杂，高z材料的封装以及重建和超晶格的形成。EG中从线性带到平面带的受控转变，以及功能化EG与界面处的二维电子气体的耦合，将为定制二维材料中的电子相关效应和介观现象开辟通道，例如超导性、自旋和电荷密度波、莫特态、新磁相以及QHE和克莱因隧道。在这个研究单位内，所有与生长、原子结构、电子结构和传输相关的领域，以及界面和原子过程的理论建模都由该联盟内的pi的专业知识涵盖。

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) 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.