Piezo-antiferromagnetic effect of sawtooth-like graphene nanoribbons
Piezo-antiferromagnetic effect of sawtooth-like graphene nanoribbons
复制标题
锯齿状石墨烯纳米带的压电反铁磁效应
DOI：
10.1063/1.4878840
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发表时间：
2014
影响因子：
4
通讯作者：
Wang Enge
中科院分区：
文献类型：
--
作者：
Zhao Shangqian;Lu Yan;Zhang Yuchun;Lu Wengang;Liang Wenjie;Wang Enge
对一种具有压电反铁磁效应的锯齿状石墨烯纳米颗粒（SGNR）进行了数值研究。随着单轴应变的增加，SGNR的基态由铁磁态转变为反铁磁态。研究了拉伸过程中自旋-电荷分布的变化。Hubbard模型揭示了碳原子π轨道间的跳跃积分是导致压电反铁磁效应的主要原因。该研究揭示了石墨烯基结构在纳米传感器和自旋电子器件中的应用。
A type of sawtooth-like graphene nanoribbon (SGNR) with piezo-antiferromagnetic effect is studied numerically. The ground state of the studied SGNR changes from nonmagnetic state to antiferromagnetic state with uniaxial strain. The changes of the spin-charge distributions during the stretching are investigated. The Hubbard model reveals that the hopping integrals between the π-orbitals of the carbon atoms are responsible to the piezo-antiferromagnetic effect. The study sheds light on the application of graphene-based structures to nanosensors and spintronic devices.