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


Highlights The curvature of graphene can be described by an interaction via a scalar particle. It was used a method for determining interaction potentials from Feynman diagrams. Were performed Monte Carlo using potentials obtained by above method in graphene. Magnetic susceptibility was sensitive to vacuum polarizations, curvature and dipole. Vacuum polarization is the key interaction potential in describing specific heat. Abstract 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 Kekulé 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. ......

【作者名称】: Ricardo Spagnuolo Martins, Elena Konstantinova, Humberto Belich, José Abdalla Helayël-Neto
【作者单位】: Centro Brasileiro de Pesquisas Físicas,Instituto Federal de Educação Ciência, Instituto Federal de Educação Ciência, Universidade Federal do Espírito Santo, Centro Brasileiro de Pesquisas Físicas
【关 键 词】: Honeycomb lattice, Magnetic susceptibility, Specific heat, Kekulé, Monte Carlo, Vacuum polarization
【期刊名称】: Journal of magnetism and magnetic materials
【期刊论文数据库】: [DBS_Articles_01]
【期刊论文编号】: 107,449,811
【摘要长度】: 2,837
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