Stability of edge states and edge magnetism in graphene nanoribbons
Stability of edge states and edge magnetism in graphene nanoribbons
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DOI：
10.1103/physrevb.83.045414
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发表时间：
2011-01-21
影响因子：
3.7
通讯作者：
Fehske, Holger
中科院分区：
文献类型：
--
作者：
Kunstmann, Jens;Ozdogan, Cem;Fehske, Holger
我们批判性地讨论了锯齿形边缘石墨烯纳米带（zgnr）的边缘状态和边缘磁性的稳定性。我们指出磁边缘状态在实际系统中可能不存在，并表明至少有三种非常自然的机制——边缘重建、边缘钝化和边缘闭合——可以显著降低甚至完全消除zgnr中边缘状态的影响。即使可以制造出具有磁边态的系统，其本征磁性在室温下也不会稳定。电荷掺杂和边缘缺陷的存在进一步破坏了这类体系的本征磁性。
We critically discuss the stability of edge states and edge magnetism in zigzag edge graphene nanoribbons (ZGNRs). We point out that magnetic edge states might not exist in real systems and show that there are at least three very natural mechanisms-edge reconstruction, edge passivation, and edge closure-which dramatically reduce the effect of edge states in ZGNRs or even totally eliminate them. Even if systems with magnetic edge states could be made, the intrinsic magnetism would not be stable at room temperature. Charge doping and the presence of edge defects further destabilize the intrinsic magnetism of such systems.