239 citations · 2.2k across the 65 of their papers we have counts for
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Amplitude mode in Eliashberg superconductors
Maxim Dzero, Emil A. Yuzbashyan
In the BCS theory of superconductivity the amplitude (Higgs) mode is degenerate with the pair-breaking threshold: its frequency coincides with , so it is an edge singularity ra…
Nontrivial saddle points for spectral form factors of flat band superconductors
Sankalp Gaur, Emil A. Yuzbashyan, Victor Gurarie
We derive the spectral form factor of a flat band superconductor in two different ways. In the first approach, we diagonalize the Hamiltonian of this system exactly and numerically…
Fundamental limits on the electron-phonon coupling and superconducting
Dmitrii V. Semenok, Boris L. Altshuler, Emil A. Yuzbashyan
Fundamental upper bounds on the electron-phonon interaction strength and superconducting transition temperature in metals are established based on the intrinsic instability o…
Nonlocality as the source of purely quantum dynamics of BCS superconductors
Aidan Zabalo, Ang-Kun Wu, J. H. Pixley +1
We show that the classical (mean-field) description of far from equilibrium superconductivity is exact in the thermodynamic limit for local observables but breaks down for global q…
Superconductivity near a quantum critical point in the extreme retardation regime
Emil A. Yuzbashyan, Michael K. -H. Kiessling, Boris L. Altshuler
We study fermions at quantum criticality with extremely retarded interactions of the form , where is the transferred Matsubara frequency. This system unde…
Breakdown of the Migdal-Eliashberg theory and a theory of lattice-fermionic superfluidity
Emil A. Yuzbashyan, Boris L. Altshuler
We show that the Migdal-Eliashberg theory loses validity at a finite value of the electron-phonon coupling regardless of the underlying model Hamiltonian. The value of $λ…