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

Vladimirov, A. A., Ihle, D., & Plakida, N. M. (2018). Spin excitations and thermodynamics of the t-J model on the honeycomb lattice. European Physical Journal B, 91(8): 195. doi:10.1140/epjb/e2018-80712-x.

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1803.03140.pdf (Preprint), 248KB
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Vladimirov, Artem A.1, Author
Ihle, Dieter1, Author
Plakida, Nikolay M.2, Author           
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1external, ou_persistent22              
2Max Planck Institute for the Physics of Complex Systems, Max Planck Society, ou_2117288              

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 MPIPKS: Strongly correlated electrons
 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.

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Language(s): eng - English
 Dates: 2018-08-302018-08
 Publication Status: Issued
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Title: European Physical Journal B
  Other : Eur. Phys. J. B
Source Genre: Journal
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Publ. Info: Heidelberg : Springer-Verlag Heidelberg
Pages: - Volume / Issue: 91 (8) Sequence Number: 195 Start / End Page: - Identifier: ISSN: 1434-6028
CoNE: https://pure.mpg.de/cone/journals/resource/954927001233