تقرير
Spin excitations and thermodynamics of the t-J model on the honeycomb lattice
| العنوان: | Spin excitations and thermodynamics of the t-J model on the honeycomb lattice |
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| المؤلفون: | Vladimirov, A. A., Ihle, D., Plakida, N. M. |
| سنة النشر: | 2018 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Strongly Correlated Electrons |
| الوصف: | 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. Comment: 9 pages, 7 figures, submitted to European Physical Journal B. arXiv admin note: text overlap with arXiv:1703.08391 |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1140/epjb/e2018-80712-x |
| URL الوصول: | http://arxiv.org/abs/1803.03140 |
| رقم الأكسشن: | edsarx.1803.03140 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1140/epjb/e2018-80712-x |
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