Physical properties of the spin Hamiltonian on honeycomb lattice samples with Kekule and vacuum polarization corrections

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS

卷:441

Article

Martins, Ricardo Spagnuolo^1,2  Konstantinova, Elena³  Belich, Humberto⁴  Helayel-Neto, Jose Abdalla¹ 

[1] Ctr Brasileiro Pesquisas Fis, 150 Xavier Sigaud St, Rio De Janeiro, RJ, Brazil

[2] Inst Fed Educ Ciencia & Tecnol Triangulo Mineiro, Km 167 MG 188 Highway, Paracatu, MG, Brazil

[3] Inst Fed Educ Ciencia & Tecnol Sudeste Minas Gera, 1283 Bernardo Mascarenhas St, Juiz De Fora, MG, Brazil

[4] Univ Fed Espirito Santo, 514 Fernando Ferrari Av, Vitoria, ES, Brazil

关键词: Honeycomb lattice;    Magnetic susceptibility;    Specific heat;    Kekule;    Monte Carlo;    Vacuum polarization;   

DOI  :  10.1016/j.jmmm.2017.05.045

来源: Elsevier

【 摘 要 】

Magnetic and thermodynamical properties of a system of spins in a honeycomb lattice, such as magnetization, magnetic susceptibility and specific heat, in a low-temperature regime are investigated by considering the effects of a Kekule scalar exchange and QED vacuum polarization corrections to the interparticle potential. The spin lattice calculations are carried out by means of Monte Carlo simulations. We present a number of comparative plots of all the physical quantities we have considered and a detailed analysis is presented to illustrate the main features and the variation profiles of the properties with the applied external magnetic field and temperature. (C) 2017 Elsevier B.V. All rights reserved.

【 授权许可】

Free