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.

引用

页数：8

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