Spin excitations and thermodynamics of the t-J model on the honeycomb lattice View Full Text


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Article Info

DATE

2018-08

AUTHORS

Artem A. Vladimirov, Dieter Ihle, Nikolay M. Plakida

ABSTRACT

We present a spin-rotation-invariant Green-function theory for the dynamic spin susceptibility in the spin-1/2 antiferromagnetic t-J Heisenberg model on the honeycomb lattice. Employing a generalized mean-field approximation for arbitrary temperatures and hole dopings, the electronic spectrum of excitations, the spin-excitation spectrum and thermodynamic quantities (two-spin correlation functions, staggered magnetization, magnetic susceptibility, correlation length) are calculated by solving a coupled system of self-consistency equations for the correlation functions. The temperature and doping dependence of the magnetic (uniform static) susceptibility is ascribed to antiferromagnetic short-range order. Our results on the doping dependencies of the magnetization and susceptibility are analyzed in comparison with previous results for the t-J model on the square lattice. More... »

PAGES

195

Identifiers

URI

http://scigraph.springernature.com/pub.10.1140/epjb/e2018-80712-x

DOI

http://dx.doi.org/10.1140/epjb/e2018-80712-x

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1106407065


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