Magnetic properties of a doped graphene-like bilayer

被引：14

作者：

Guo, An-Bang ^{[1
]}

Jiang, Wei ^{[1
]}

Zhang, Na ^{[2
]}

机构：

[1] Shenyang Univ Technol, Sch Sci, Shenyang 110870, Peoples R China

[2] Shenyang Normal Univ, Shenyang 110034, Peoples R China

来源：

PHYSICA B-CONDENSED MATTER | 2017年 / 513卷

关键词：

Doped graphene-like bilayer; Energy gap; Quantum fluctuation; Spin-wave spectra; Magnetization; SPIN-WAVES; FERROMAGNET;

D O I：

10.1016/j.physb.2017.02.002

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

A doped graphene-like bilayer is described using a four-sublattice Heisenberg model both ferromagnetic and antiferrimagnetic couplings. The magnetic properties of the bilayer system are studied using the Heisenberg model, retarded Green's function and the linear spin-wave approximation. The spin-wave spectra, energy gap, and the magnetization and quantum fluctuation of the system at the ground state are calculated with various intra-and interlayer couplings. The results indicate that the effect of antiferromagnetic exchange coupling on the magnetic properties of the system is significant. Magnetizations at low temperature show intersection points due to the quantum effects.

引用

页码：21 / 28

页数：8

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