Speaker
Description
Rhombohedral multilayer graphene (RMG) exhibits a rich phase diagram with a variety of magnetic, superconducting, and topological phases, making it a highly interesting material for current condensed matter research. In addition, the introduction of a moiré pattern can reveal further emergent phenomena. For example, RMG with an imposed moiré potential by an hBN substrate has been shown to host a fractional quantum anomalous Hall effect.$^1$ However, in this architecture the moiré pattern is fixed during fabrication and cannot be tuned afterwards, limiting systematic studies and exploration of correlated phases in RMG.
In this talk, we present the fabrication process and first characterization of a novel device designed to study the properties and phase diagram of RMG using a tunable moiré superlattice. This approach aims to systematically investigate the highly correlated electron system. This talk will discuss the device design, fabrication challenges, preliminary measurements, and the outlook for future experiments.
$^1:$ Zhengguang Lu et al., “Fractional Quantum Anomalous Hall Effect in Multilayer Graphene,” Nature 626, 759-764 (2024).