61 citations · 134 across the 8 of their papers we have counts for
7 papers · 1 filter
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…
On the engineering of higher-order Van Hove singularities in two dimensions
Anirudh Chandrasekaran, Luke C. Rhodes, Edgar Abarca Morales +4
The properties of correlated electron materials are often intricately linked to Van Hove singularities (VHS) in the vicinity of the Fermi energy. The class of these VHS is of great…
Single monkey-saddle singularity of a Fermi surface and its instabilities
Ömer M. Aksoy, Anirudh Chandrasekaran, Apoorv Tiwari +3
Fermi surfaces can undergo sharp transitions under smooth changes of parameters. Such transitions can have a topological character, as is the case when a higher-order singularity,…
Resonant inelastic X-ray scattering in the topological semimetal FeSi
Yao Shen, Anirudh Chandrasekaran, Jennifer Sears +8
The energy spectrum of topological semimetals contains protected degeneracies in reciprocal space that correspond to Weyl, Dirac, or multifold fermionic states. To exploit the unco…
A practical method to detect, analyse and engineer higher order Van Hove singularities in multi-band Hamiltonians
Anirudh Chandrasekaran, Joseph J. Betouras
We present a practical method to detect, diagnose and engineer higher order Van Hove singularities in multiband systems, with no restrictions on the number of bands and hopping ter…
Effect of disorder on density of states and conductivity in higher order van Hove singularities in two dimensional bands
Anirudh Chandrasekaran, Joseph J. Betouras
We study systems with energy bands in two dimensions, hosting higher order Van Hove singularities (HOVHS) in the presence of disorder, using standard diagrammatic techniques for im…
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…