Research Interests

My research is currently focused on quantum transport and optoelectronic measurements in low dimensional materials and combination of 2D materials stacked together as van der Waals heterostructures. Graphene is a material of choice in this field.

General Reading:

Quantum Hall effect in graphene heterostructures

The quantum Hall effect represents an experimental manifestation of quantum mechanics and topology in condensed matter systems. It provides a powerful experimental tool for studying the interactions between electrons in two-dimensional systems exposed to high magnetic fields. I am interested in investigating the quantum Hall effect in a variety of systems and harnessing quantum Hall edges to create novel electronic states. For example, graphene superlattices exhibit a complex fractal spectrum, that can be viewed as a collection of Landau levels arising from quantisation of Brown-Zak minibands recurring at rational (p/q) fractions of the magnetic flux per superlattice unit cell. Another example is the quantum Hall effect observed in thin graphitic films. We observed evidences of phase transitions and surface-mediated transport.

Recent articles on the topic:
  1. One-Dimensional Proximity Superconductivity in the Quantum Hall Regime, Nature 628, 741 (2024). [arXiv:2402.14451] [DOI] [PDF]
  2. Long-Range Ballistic Transport of Brown-Zak Fermions in Graphene Superlattices, Nature Communications 11, 5756 (2020). [arXiv:2006.15040] [DOI] [PDF] [SI]
  3. Electronic Phase Separation in Multilayer Rhombohedral Graphite, Nature 584, 210 (2020). [arXiv:1911.04565] [DOI]

High temperature quantum transport

Dirac fermions have a linear dispersion relation: their energy is proportional to their momentum. This unique properties is present in graphene and topological insulators. Under high temperatures, the intrinsic behaviour of Dirac fermions can emerge in an electron-hole plasma of Dirac fermions. I have investigated the behaviour of the Dirac plasma under high magnetic fields, reporting magnetotransport in this quantum-critical regime. This direction could offer advances in other fields, such as magnetotransport in strange metals or Weyl metals. Another project was dedicated on magnetotransport in graphene superlattices, where Brown-Zak fermions were observed as longitudinal resistance maxima for fixed fields.

Recent articles on the topic:
  1. Giant Magnetoresistance of Dirac Plasma in High-Mobility Graphene, Nature 616, 270 (2023). [arXiv:2302.06863] [DOI]
  2. Long-Range Ballistic Transport of Brown-Zak Fermions in Graphene Superlattices, Nature Communications 11, 5756 (2020). [arXiv:2006.15040] [DOI] [PDF] [SI]