Research
Our group studies quantum electronic transport phenomena in nanoscale devices based on graphene and its van der Waals heterostructures with other 2D materials.
Few-layer Graphene
Few-layer graphene consists of a small number of graphene layers, typically two to ten, stacked on top of each other. This type of graphene exhibits a range of unique electronic properties such as electrically tunable band structures, Landau level crossings, and superconductivity at van Hove singularity. These unique properties result from the two-dimensional nature of graphene and the interaction between the stacked layers.
Moiré Materials
Moiré materials comprise two atomically thin periodic layers that are stacked with a slight misalignment. The misaligned stack gives rise to an interference pattern with a longer periodicity or the moiré pattern. This pattern can be found in a variety of systems, dominant among which are graphene van der Waals heterostructures, twisted bilayer and trilayer graphene. Such moiré systems exhibit remarkable tunable electrical and optical properties, lending themselves to potential applications in electronics, sensors, and energy conversion technologies.
van der Waals Heterostructures
van der Waals heterostructures are a stack of atomically thin layers of materials held together by van der Waals forces, which are weak attractive forces between molecules. These heterostructures may consist of a variety of 2D materials, such as graphene, hexagonal boron nitride, or transition metal dichalcogenides. The ability to stack and alter properties of such van der Waals heterostructures make them viable for use in a wide range of devices and technologies.
Quantum Devices
Quantum devices are nanoscale devices that utilize the unique properties of quantum mechanics to perform specific functions. These devices capitalize on the wave-like nature of quantum particles to perform tasks otherwise impossible or impractical with classical physics. Quantum devices have potential applications in a wide range of fields, including electronics, computing, sensing, and energy conversion.