1 citations · 1 across the 9 of their papers we have counts for
10 papers
Does a pole in the self-energy imply a violation of the Luttinger theorem?
Artem Abanov, Andrey Chubukov
Luttinger theorem relates Fermi surface volume to electron density per spin . It holds in an arbitrary Fermi liquid but is widely believed to break when a fermionic self-energy…
Stoner transitions beyond mean-field in two-dimensional electronic systems: a diagrammatic Monte Carlo study
Yueh-Chen Lee, Nikolay V. Prokof'ev, Andrey V. Chubukov
Stoner instabilities for fermions with repulsive interaction have been well studied within the mean-field (ladder) approximation. In this study, we consider two-dimensional electro…
Non-BCS Pairing by a Singular Dynamical Interaction
Artem G. Abanov, Andrey V. Chubukov
This review examines the theory of superconductivity in systems with {\em singular dynamical} electron-electron interaction and contrasts it with a conventional BCS superconductivi…
Magnetic field induced transition from nodeless to nodal superconductivity in -PdBi
Emmanouil K. Kokkinis, Joseph J. Betouras, Andrey V. Chubukov
Recent tunneling measurements on -PdBi reported a magnetic field induced phase transition from a fully gapped to a nodal superconducting state. We develop a microscopic theo…
Avoided Stoner instability at a single ordinary Van Hove point
I. S. Tupitsyn, B. Currie, A. V. Chubukov +3
When the Fermi surface and the Brillouin zone boundary touch at a Van Hove point, mean-field analysis predicts a ferromagnetic (Stoner) instability at finite for any coupl…
Nematic Phase Transitions in Multilayer Graphene Systems
R. David Mayrhofer, Andrey V. Chubukov
Recent experiments on graphene multilayers under displacement field have demonstrated a wide variety of electronically ordered phases, including valley and/or spin polarized phases…
Superconductivity mediated by nematic fluctuations -- the dispersion of collective modes
Kazi Ranjibul Islam, Andrey Chubukov
We analyze the spectrum of collective modes in a superconductor in which pairing is mediated by long-range nematic fluctuations. Previous experimental and theoretical studies have…
Breakdown of the Migdal-Eliashberg theory for electron-phonon systems. Role of polarons/bi-polarons
Andrey Chubukov, Ilya Esterlis, Artem Abanov +1
The Migdal-Eliashberg theory (MET) describes electrons interacting with phonons in the adiabatic limit when the phonon Debye frequency is much smaller than the Fermi energy. A conv…
Limits of validity for Migdal-Eliashberg theory: role of polarons/bi-polarons
Nikolay Prokof'ev, Ilya Esterlis, Artem Abanov +1
It is widely believed that in the adiabatic limit the Fermi liquid state of an electron-phonon system, described by Migdal-Eliashberg theory, remains stable until the dressed phono…
Topologically non-trivial gap function and topology-induced time-reversal symmetry breaking in a superconductor with singular dynamical interaction
Yue Yu, Andrey V. Chubukov
In many strongly correlated electron systems, non-Fermi liquid behavior and unconventional superconductivity can be viewed as emerging from an effective 4-fermion interaction with…