This article is cited in 4 papers

Generalized Kondo lattice model and its spin-polaron realization by the projection method for cuprates

V. V. Valkov^a, D. M. Dzebisashvili^ba, A. F. Barabanov<sup>c

a</sup> Kirensky Institute of Physics, Siberian Branch, RAS, Krasnoyarsk, Russia
^b Reshetnyov Siberian State Aerospace University, Krasnoyarsk, Russia
^c Institute for High Pressure Physics, RAS, Troitsk, Moscow Oblast, Russia

Abstract: The spin–fermion model, which is an effective low-energy realization of the three-band Emery model after passing to the Wannier representation for the $p_x$ and $p_y$ orbitals of the subsystem of oxygen ions, reduces to the generalized Kondo lattice model. A specific feature of this model is the existence of spin-correlated hoppings of the current carriers between distant cells. Numerical calculations of the spectrum of spin-electron excitations highlight the important role of the long-range spin-correlated hoppings.

Keywords: strong electron correlation, spin–fermion model, Kondo lattice model, spin polaron.

Received: 23.05.2016
Revised: 08.07.2016

DOI: 10.4213/tmf9234

 English version: Theoretical and Mathematical Physics, 2017, 191:2, 752–763

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