174 citations · 1.3k across the 60 of their papers we have counts for
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Pressure and Proximity Tuned Twisted Bilayer Graphene
David T. S. Perkins, Joseph J. Betouras
The coupling between layered atomically-thin materials mediated by van der Waals forces allows strong electronic correlations, unique topological signatures, and non-trivial spin t…
Magnetic field induced transition from nodeless to nodal superconductivity in -PdBi
Emmanouil K. Kokkinis, Joseph J. Betouras, Andrey V. Chubukov
Recent tunneling measurements on -PdBi reported a magnetic field induced phase transition from a fully gapped to a nodal superconducting state. We develop a microscopic theo…
Twisted Kagome Bilayers: High-Order Van Hove Singularities, Sublattice Interference, Magic Angles, and Possible Topology
David T. S. Perkins, Joseph J. Betouras
We develop a low-energy continuum model to describe the moiré physics of heterostructures, which is a generalization of the celebrated Bistritzer-MacDonald (BM) method [R. Bistritz…
Triplet superconductivity supported by an X high-order Van Hove singularity
Chethan Sanjeevappa, Anirudh Chandrasekaran, Joseph J. Betouras
We study a four-fold symmetric dispersion relation of a quantum material, which exhibits a single high-order Van Hove singularity of X type at the Fermi energy. First, we analy…