3 papers
cond-mat.supr-con2026
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…
cond-mat.str-el2025
Designing Topological High-Order Van Hove Singularities: Twisted Bilayer Kagomé
David T. S. Perkins, Anirudh Chandrasekaran, Joseph J. Betouras
The interplay of high-order Van Hove singularities and topology plays a central role in determining the nature of the electronic correlations governing the phase of a system with u…
cond-mat.str-el2019
Catastrophe theory classification of Fermi surface topological transitions in two dimensions
Anirudh Chandrasekaran, Alex Shtyk, Joseph J. Betouras +1
We classify all possible singularities in the electronic dispersion of two-dimensional systems that occur when the Fermi surface changes topology, using catastrophe theory. For sys…