Ferrimagnetism and single-particle excitations in a periodic Anderson model on the honeycomb lattice

被引：3
|
作者：
Seki, Kazuhiro [1 ]
Shirakawa, Tomonori [1 ,2 ]
Zhang, Qinfang [3 ]
Li, Tao [4 ]
Yunoki, Seiji [1 ,2 ,5 ]
机构：
[1] RIKEN, Computat Condensed Matter Phys Lab, Wako, Saitama 3510198, Japan
[2] RIKEN, Adv Inst Computat Sci, Computat Mat Sci Res Team, Kobe, Hyogo 6500047, Japan
[3] Yancheng Inst Technology, Key Lab Adv Technol Environm Protect Jiangsu Prov, Yancheng 224051, Peoples R China
[4] Renmin Univ China, Dept Phys, Beijing 100872, Peoples R China
[5] RIKEN, Ctr Emergent Matter Sci, Computat Quantum Matter Res Team, Wako, Saitama 3510198, Japan
来源：
INTERNATIONAL WORKSHOP ON DIRAC ELECTRONS IN SOLIDS 2015 | 2015年 / 603卷
关键词：
HUBBARD-MODEL;
D O I：
10.1088/1742-6596/603/1/012024
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
By using the variational cluster approximation and cluster perturbation theory, we investigate the magnetism and single-particle excitations of a periodic Anderson model on the honeycomb lattice as an effective model for the single-side hydrogenated graphene, namely, graphone. We calculate the magnetic moment as a function of U (Coulomb interaction on impurity sites) with showing that the ground state is ferrimagnetic for any U > 0. We then calculate the single-particle excitations and show that the single-particle excitations are gapless and exhibit quadratic dispersion relation near the Fermi energy.
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收藏
页数：8
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