22 citations · 106 across the 12 of their papers we have counts for
12 papers
Effective approach to the Nagaoka regime of the two dimensional t-J model
M. M. Maska, M. Mierzejewski, E. A. Kochetov +3
We argue that the t-J model and the recently proposed Ising version of this model give the same physical picture of the Nagaoka regime for J/t << 1. In particular, both models are…
Electronic properties of disclinated flexible membrane beyond the inextensional limit: Application to graphene
E. A. Kochetov, V. A. Osipov, R. Pincak
Gauge-theory approach to describe Dirac fermions on a disclinated flexible membrane beyond the inextensional limit is formulated. The elastic membrane is considered as an embedding…
Dirac fermions on a disclinated flexible surface
E. A. Kochetov, V. A. Osipov
A self-consisting gauge-theory approach to describe Dirac fermions on flexible surfaces with a disclination is formulated. The elastic surfaces are considered as embeddings into R^…
The breakdown of the mean-field description of the Nagaoka phase
Evgueny Kochetov, Fabio L. Braghin, Alvaro Ferraz
We discuss the relevance of the improved mean-field slave-fermion theory to describe the Nagaoka () limit of the Hubbard model. In this theory the crucial on-site constra…
Low-energy effective representation of the Gutzwiller-projected BCS Hamiltonian close to half filling
Evgueny Kochetov, Alvaro Ferraz, Rafael T. Pepino
We investigate analytically a connection between the t-J model and the strongly correlated Bardeen-Cooper-Schrieffer (BCS) Hamiltonian, with the effect of strong electron correlati…
Doped carrier formulation of the t-J model: the projection constraint and the effective Kondo-Heisenberg lattice representation
Rafael T. Pepino, Alvaro Ferraz, Evgueny Kochetov
We show that the recently proposed doped carrier Hamiltonian formulation of the t-J model should be complemented with the constraint that projects out the unphysical states. With t…