10 citations · 29 across the 7 of their papers we have counts for
7 papers
Strong Correlation, Bloch Bundle Topology and Spinless Haldane-Hubbard Model
Ilya Ivantsov, Alvaro Ferraz, Evgenii Kochetov
Different realizations of the Hubbard operators in different Hilbert spaces give rise to various microscopic lattice electron models driven by strong correlations. In terms of the…
Hubbard model vs. Kondo model: Strong coupling limit
Ilya Ivantsov, Alvaro Ferraz, Evgenii Kochetov
The Hubbard model and the lattice Kondo model are shown to become identical in the strong-coupling limit. A departure from the strong-coupling regime produces distinct theories, ho…
Stable and Metastable Kinetic Ferromagnetism on a Ring
Ilya Ivantsov, Hernan B. Xavier, Alvaro Ferraz +1
Performing an exact diagonalization of the effective spin problem, a ferromagnetic ground state of kinetic origin is shown to emerge in a system of strongly correlated electron…
Fermi Surface Reconstruction in Underdoped Cuprates: The Origin of Electron Pockets
Ilya Ivantsov, Alvaro Ferraz, Evgenii Kochetov
A new phenomenological model is proposed to describe the evolution of the Fermi surface (FS) in a wide range of dopings. It reproduces the key features of the cuprates in the under…
Itinerant-localized model of strongly correlated electrons: Fermi-surface reconstruction
Ilya Ivantsov, Alvaro Ferraz, Evgenii Kochetov
A number of recent experiments have highlighted a remarkable transformation of a large cuprate Fermi surface into small pockets in the underdoped region signalling a breakdown of a…
Breakdown of the Nagaoka phase at finite doping
Ilya Ivantsov, Alvaro Ferraz, Evgenii Kochetov
The Nagaoka () limit of the Hubbard model on a square lattice is mapped onto the itinerant-localized Kondo model at infinitely strong coupling. Such a model is well suite…