Adatom-induced local reconstructions in zigzag silicene nanoribbons: Spin semiconducting properties and large spin thermopowers

被引：5

作者：

Yang, X. F. ^{[1
]}

Zou, X. L. ^{[1
]}

Kuang, Y. W. ^{[1
]}

Shao, Z. G. ^{[1
]}

Zhang, J. ^{[1
]}

Hong, X. K. ^{[1
]}

Zhang, D. B. ^{[1
]}

Feng, J. F. ^{[1
]}

Chen, X. S. ^{[2
]}

Liu, Y. S. ^{[1
,2
]}

机构：

[1] Changshu Inst Technol, Coll Phys & Elect Engn, Changshu 215500, Peoples R China

[2] Chinese Acad Sci, Shanghai Inst Tech Phys, Natl Lab Infrared Phys, Shanghai 200083, Peoples R China

来源：

CHEMICAL PHYSICS LETTERS | 2017年 / 667卷

基金：

中国国家自然科学基金;

关键词：

Zigzag silicene nanoribbons; Spin semiconducting properties; Thermospin effects; First-principles methods; GIANT MAGNETORESISTANCE; ELECTRONIC-PROPERTIES;

D O I：

10.1016/j.cplett.2016.11.049

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Using first-principles methods, we have investigated magnetic properties and thermospin effects of zigzag silicene nanoribbons (ZSiNRs) absorbed by a single Si atom. After a relaxation, a steady dumbbell-like structure is formed, which induces a weaker antiferromagnetic (AFM) coupling between two zigzag edges. Therefore, a band gap is opened, meanwhile the adsorbed ZSiNRs show a spin semiconducting property. A large spin thermopower and weak charge thermopower in adsorbed ZSiNR-based devices can be simultaneously achieved, which is attributed to a nearly perfect mirror symmetry of spin-up and spin-down transmission spectra relative to the Fermi level. (C) 2016 Published by Elsevier B.V.

引用

页码：113 / 119

页数：7

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