英语翻译1.IntroductionThe concept “spintronics” has attracted co

英语翻译
1.Introduction
The concept “spintronics” has attracted considerable scientific interest in recent years,and it has now been igniting a revolution in computer science,information science,and other areas [1-4].The “half-metallic” material,a new class of compound,whose electrical current can be completely spin polarized,has been considered a good candidate for spintronic applications due to the coexistence of the metallic nature for electrons with one spin orientation and an semiconductor or insulating nature for the other spin orientation.In view of the potential for use of this property in designing spin-based electronics,searching for half-metallic materials has become a hot topic ever since de Groot et al.theoretically predicted that the Hesuler compound (NiMnSb) exhibit half-metallic nature in 1983 [5].The half-metallic behavior has been reported in three-dimensional materials such as manganese perovskites [6] Zinc-blende (ZB) (such as CrAs and CrSb in ZB structure),Fe3O4 and CrO2 [6].Interestingly,the half-metallic behavior has been predicted for two-dimensional graphene nanoribbons in the presence of external electric field [7],which opens a new path to explore spintronics at the nanometers scale.
A challenge for technological applications at the nanosclae is to find half metallic behavior in one-dimensional structures.To this regard,Xiang [8] and Maslyuk [9] have independently observed that the one-dimensional organometallic manganese- and vanadium-benzene nanowires exhibit half-metallic nature.An attractive point is that the finite zigzag carbon nanotube (CNT) itself has been shown to possess half-metallic behavior in the presence of electric field [10-14].In addition,recent studies have shown that half-metallicity might be induced to the functionalized boron nitride (BN) systems,such as fully bare BN nanoribbons [15] and the BN nanotubes filled with Ni cluster [16].
In this letter,we theoretically propose an alternative strategy to achieve the half-metallic behavior by simply encapsulating small molecules with unpaired electrons (including NO,NO2,and O2) inside zigzag CNTs.The advantage of the proposed strategy is that 1) the structural integrality of CNT can be well preserved,and 2) the encapsulated small molecules are stable and easily manipulated.To our knowledge,no prior theoretical study has been reported on this issue.
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1.介绍
　　这个概念的“自旋电子学”吸引了可观的科学兴趣,近年来,它现在已经引发一场革命在计算机科学、信息科学、及其他地区(1-4].“half-metallic”资料,一个新的类化合物,其电流可以完全自旋极化,一直被认为是一种很有前途的自旋电子应用定理与金属自然,为电子自旋方向和半导体或绝缘性质定位为其他旋转.针对这种性质的潜力,在设计spin-based电子学,寻找half-metallic材料已成为热门话题,自从德Groot等理论预测,Hesuler化合物(NiMnSb)展示half-metallic大自然在1983年[5].这个half-metallic行为已经被报道在三维的材料,如锰perovskites[6]Zinc-blende(ZB)(如CrAs和CrSb ZB结构中,Fe3O4和CrO2[6].有趣的是,half-metallic行为进行了预测,nanoribbons二维graphene在外部电场[7],打开一个新路径探索在奈米尺度自旋电子学.
　　一个挑战就是在nanosclae技术应用于寻找半金属行为的一维的结构.对这方面,湘[8]和Maslyuk[9]有独立的一维organometallic锰-和vanadium-benzene奈米线half-metallic展览性质.一个吸引人的地方是有限的曲折的碳纳米管本身已被证明具有half-metallic行为在电场[10-14].此外,最近的研究表明half-metallicity可能导致功能化的氮化硼(亿美元)的系统中,如完全裸露亿nanoribbons(15)和亿奈米碳管充满了镍集群[16].
　　在这封信里,我们理论上提出另一种策略,实现了由简单half-metallic行为与未成对的电子封装的小分子(包括任何、NO2、O2)内曲折的碳纳米管.该策略的优势在于:(1)的结构完整性CNT的可保存完好,和(2)封装的小分子是稳定、易操作.据我们所知,没有事先的理论研究已经有报道说在这个问题上.