133 citations · 978 across the 29 of their papers we have counts for
12 papers · 1 filter
Robustness of the Kohn-Luttinger mechanism against symmetry breaking
Amir Dalal, Jonathan Ruhman, Vladyslav Kozii
We investigate how strongly broken spatial symmetries affect the Kohn--Luttinger (KL) mechanism, in which superconductivity emerges purely from repulsive interactions. While the or…
Nonunitary spin-triplet superconductors in Zeeman magnetic field
Wen Li, Vahid Hassanzade, Maxim Dzero +1
We study spin-triplet superconductivity with both unitary and nonunitary pairing in the presence of an external Zeeman magnetic field. Within a mean-field framework, we exactly dia…
The field theory of a superconductor with repulsion
Amir Dalal, Jonathan Ruhman, Vladyslav Kozii
A superconductor emerges as a condensate of electron pairs, which bind despite their strong Coulomb repulsion. Eliashberg's theory elucidates the mechanisms enabling them to overco…
Synergetic ferroelectricity and superconductivity in zero-density Dirac semimetals near quantum criticality
Vladyslav Kozii, Avraham Klein, Rafael M. Fernandes +1
We study superconductivity in a three-dimensional zero-density Dirac semimetal in proximity to a ferroelectric quantum critical point. We find that the interplay of criticality, in…
The effect of interorbital scattering on superconductivity in doped Dirac materials
David Dentelski, Vladyslav Kozii, Jonathan Ruhman
Unconventional superconductivity has been discovered in a variety of doped materials, including topological insulators, semimetals and twisted bilayers. A unifying property of thes…
Superconductivity near a ferroelectric quantum critical point in ultralow-density Dirac materials
Vladyslav Kozii, Zhen Bi, Jonathan Ruhman
The experimental observation of superconductivity in doped semimetals and semiconductors, where the Fermi energy is comparable to or smaller than the characteristic phonon frequenc…
Nematic superconductivity stabilized by density wave fluctuations: Possible application to twisted bilayer graphene
Vladyslav Kozii, Hiroki Isobe, Jörn W. F. Venderbos +1
Nematic superconductors possess unconventional superconducting order parameters that spontaneously break rotational symmetry of the underlying crystal. In this work we propose a me…
Odd-parity superconductivity near inversion breaking quantum critical point in one dimension
Jonathan Ruhman, Vladyslav Kozii, Liang Fu
We study how an inversion-breaking quantum critical point affects the ground state of a one-dimensional electronic liquid with repulsive interaction and spin-orbit coupling. We fin…
Three-Dimensional Majorana Fermions in Chiral Superconductors
Vladyslav Kozii, Jörn W. F. Venderbos, Liang Fu
Through a systematic symmetry and topology analysis we establish that three-dimensional chiral superconductors with strong spin-orbit coupling and odd-parity pairing generically ho…
Identification of nematic superconductivity from the upper critical field
Jörn W. F. Venderbos, Vladyslav Kozii, Liang Fu
Recent nuclear magnetic resonance and specific heat measurements have provided concurring evidence of spontaneously broken rotational symmetry in the superconducting state of the d…
Odd-parity superconductors with two-component order parameters: nematic and chiral, full gap and Majorana node
Jörn W. F. Venderbos, Vladyslav Kozii, Liang Fu
Motivated by the recent experiment indicating that superconductivity in the doped topological insulator CuBiSe has an odd-parity pairing symmetry with rotational symmet…
Odd-parity superconductivity in the vicinity of inversion symmetry breaking in spin-orbit-coupled systems
Vladyslav Kozii, Liang Fu
We study superconductivity in spin-orbit-coupled systems in the vicinity of inversion symmetry breaking. We find that due to the presence of spin-orbit coupling, fluctuations of th…