174 citations · 1.3k across the 60 of their papers we have counts for
60 papers
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…
Anisotropic scattering rates in strain-tuned SrRuO
Ben Currie, David T. S. Perkins, Evgeny Kozik +2
Motivated by recent angle-resolved photoemission spectroscopy (ARPES) experiments, we analyze the temperature, frequency, and momentum dependence of the single-particle scattering…
Effects of high-order Van Hove singularities on exciton and trion energy dispersions
Lewis J. Burke, Mark T. Greenaway, Joseph J. Betouras
We investigate the effects of Van Hove singularities in the electronic band structure of two-dimensional semiconductors on the energy dispersion of excitons and positive trions. In…