78 citations · 271 across the 8 of their papers we have counts for
8 papers
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…
Topological electronic properties of silicon
Alex Shtyk, Claudio Chamon
The central role that materials play in human history is exemplified by the three-age division of prehistory into the stone, bronze, and iron ages. References to our present time a…
Ultrasonic attenuation in a pseudogapped superconductor
A. V. Shtyk, M. V. Feigel'man
We develop a theory of ultrasound decay rate in a model of a superconductor with a large pseudogap , and show that at low temperatures () the magnitude of the d…
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…
Magnetic field-induced giant enhancement of electron-phonon energy transfer in strongly disordered conductors
A. V. Shtyk, M. V. Feigel'man, V. E. Kravtsov
Relaxation of soft modes (e.g. charge density in gated semiconductor heterostructures, spin density in the presence of magnetic field) slowed down by disorder may lead to giant enh…
Electron-Electron Interactions and Plasmon Dispersion in Graphene
L. S. Levitov, A. V. Shtyk, M. V. Feigelman
Plasmons in two-dimensional electron systems with nonparabolic bands, such as graphene, feature strong dependence on electron-electron interactions. We use a many-body approach to…
Dynamic susceptibility of a spin ice near the critical point
A. V. Shtyk, M. V. Feigelman
We consider spin ice magnets (primarily, ) in the vicinity of their critical point on the plane. We find that the longitudinal susceptibility diverges…