78 citations · 271 across the 8 of their papers we have counts for
3 papers · 1 filter
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…
Multicritical Fermi surface topological transitions
Dmitry V. Efremov, Alex Shtyk, Andreas W. Rost +3
A wide variety of complex phases in quantum materials are driven by electron-electron interactions, which are enhanced through density of states peaks. A well known example occurs…
Electrons at the monkey saddle: a multicritical Lifshitz point
Alex Shtyk, Garry Goldstein, Claudio Chamon
We consider 2D interacting electrons at a monkey saddle with dispersion . Such a dispersion naturally arises at the multicritical Lifshitz point when three…