Research 

Twistronics & Moiré Quantum Phases

Twisted bilayer and multilayer 2D materials exhibit fascinating emergent quantum phenomena due to moiré superlattices. By precisely controlling the twist angle between layers, new correlated electronic states such as superconductivity, correlated insulators, and ferroelectricity can emerge. These systems provide an exciting platform to study strong electron interactions and topology in condensed matter physics, offering potential applications in quantum computing and next-generation electronic devices.

2D van der Waals Heterostructures & Nanoelectronics

Because atomically thin crystals have no dangling bonds, layers with very different electronic, optical, or magnetic properties can be stacked into heterostructures with essentially unlimited combinations. We use this freedom to engineer band alignment, interlayer coupling, and charge transfer at 2D interfaces, creating structures whose electronic behavior cannot be obtained from any single constituent material. We translate this interface physics into working devices  field-effect transistors, photodetectors, and light-emitting structures exploiting effects such as interlayer charge transfer to push device-relevant metrics like responsivity, mobility, and noise performance. 

Electronic Compressibility 

Measuring how easily a 2D electron system can be compressed — its electronic compressibility — offers a direct window into its density of states, charge ordering, and many-body interactions, complementing standard conductance measurements. We use quantum capacitance and compressibility measurements to study correlated states in moiré materials and layered semiconductors, and combine these techniques with high magnetic fields to investigate quantum Hall physics: symmetry-broken Landau levels, topological edge states, and the interplay between strong correlations and orbital magnetism.

Electron Interferometry & Edge-State Physics

Quantum Hall edge channels are chiral, one-dimensional conducting channels along which electrons — or, in the fractional quantum Hall regime, fractionally charged quasiparticles — propagate coherently without backscattering. This makes them a natural platform for electron interferometry: by weakly coupling edge channels, for instance using quantum point contacts or at a graphene p-n junction that interfaces two quantum Hall phases, an Aharonov-Bohm interferometer can be formed to probe the coherence and internal structure of these edge states. We use this approach to study the properties and coherence of integer and fractional quantum Hall edge states, connecting mesoscopic electron interference to the underlying many-body physics of the quantum Hall effect.