共 41 条
Electronic and Spin-Dependent Optical Properties of Fe-Adsorbed Armchair Silicene/Silicane Superlattices
被引:6
作者:
Deng, Jiao
[1
,2
]
Li, Jin
[1
,2
]
He, Chaoyu
[1
,2
]
Ouyang, Tao
[1
,2
]
Zhang, Chunxiao
[1
,2
]
Tang, Chao
[1
,2
]
Li, Zhenqing
[1
,2
]
Tang, Yi
[1
,2
]
Zhong, Jianxin
[1
,2
]
机构:
[1] Xiangtan Univ, Hunan Key Lab Micronano Energy Mat & Devices, Xiangtan 411105, Hunan, Peoples R China
[2] Xiangtan Univ, Sch Phys & Optoelect Engn, Xiangtan 411105, Hunan, Peoples R China
来源:
PHYSICA STATUS SOLIDI-RAPID RESEARCH LETTERS
|
2020年
/
14卷
/
01期
基金:
中国国家自然科学基金;
关键词:
enhanced optical absorption;
spin polarization;
superlattices;
TOTAL-ENERGY CALCULATIONS;
SILICENE;
GRAPHENE;
HETEROSTRUCTURES;
SILICANE;
D O I:
10.1002/pssr.201900494
中图分类号:
T [工业技术];
学科分类号:
08 ;
摘要:
The electronic and optical properties of Fe-adsorbed silicene/silicane superlattices (Fe-SSSLs) with armchair interface are studied by first-principles calculations. It is demonstrated that the SSSLs show spin polarization after adsorption of Fe atoms, and the bandgaps of different Fe-SSSLs exhibit oscillatory behaviors with the width of silicene region. Except for (6,4)-SSSL with a small total magnetic moment (about 0.06 mu(B) cell(-1)), all other Fe-SSSLs have a total magnetization moment of 2.00 mu(B) cell(-1), which comes from the 3d orbitals of Fe atom. Furthermore, there is a great enhancement of optical absorption in the infrared-light region for Fe-SSSLs, which is caused by the transition in a single spin channel due to Fe adsorption. The results show that Fe adsorption can tune the electronic and optical properties of armchair SSSLs effectively, which makes armchair Fe-SSSLs attractive candidates for spin-polarized photoelectric device applications.
引用
收藏
页数:6
相关论文