Effects of symmetry and Stone–Wales defect on spin-dependent electronic transport in zigzag graphene nanoribbons
Effects of symmetry and Stone–Wales defect on spin-dependent electronic transport in zigzag graphene nanoribbons
复制标题
DOI：
10.1063/1.3309775
复制
发表时间：
2010-02
影响因子：
3.2
通讯作者：
Yun Ren;Keqiu Chen
中科院分区：
文献类型：
--
作者：
Yun Ren;Keqiu Chen
用第一性原理量子输运计算方法研究了锯齿形石墨烯纳米带(ZGNR)的电子输运性质。考虑了对称性和缺陷的影响。结果表明，当考虑自旋极化时，对称和非对称ZGNR都表现出半导体行为，这与自旋非极化的结果不同。ZGNRs的对称性在电子输运行为中起着重要作用。非对称ZGNR表现出单调的输运行为。然而，在对称的ZGNRs系统中，观察到负差分电阻。缺陷的影响在对称ZGNR系统中比在非对称系统中更为明显。对这些结果进行了物理分析。
Spin-dependent electronic transport properties in zigzag graphene nanoribbons (ZGNRs) are studied using first-principles quantum transport calculations. The effects of the symmetry and defect have been considered. The results show that when the spin polarization is considered, both symmetric and asymmetric ZGNRs present semiconductor behavior, which is different from spin-unpolarized result. The symmetry of ZGNRs plays an important role in electron transport behavior. Asymmetric ZGNR displays monotonic transport behavior. However, in symmetric ZGNRs systems, negative differential resistance is observed. The influence of defect is more obvious in symmetric ZGNRs than in asymmetric systems. A physical analysis of these results is given.