石墨烯中局域形变引起的Aharonov-Bohm干涉
Aharonov-Bohm interferences from local deformations in graphene
摘要：
石墨烯最有趣的方面之一是结构和电子性质之间的联系。在石墨烯样品中观察到的波纹，无论是独立的，在基板上引起了一个非常积极的调查周围的膜状性质的石墨烯和波纹的起源仍然是最有趣的开放的问题之一，在系统中。通过虚拟规范场对曲率和弹性形变的建模，成功地描述了结构和电子性质的相互作用，在提出朗道能级可以形成与石墨烯中的应变相关的并随后得到实验证实之后，虚拟规范场已经成为实验现实。在这里，我们提出了一种设备，以检测石墨烯的微应力的基础上，扫描隧道显微镜设置能够测量Aharonov-Bohm干涉在纳米尺度。在局域态密度中观察到的干涉是由与样品的弹性形变相关的虚拟磁场产生的。
英文摘要：
One of the most interesting aspects of graphene is the tied relation between structural and electronic properties. The observation of ripples in the graphene samples both free standing and on a substrate has given rise to a very active investigation around the membrane-like properties of graphene and the origin of the ripples remains as one of the most interesting open problems in the system. The interplay of structural and electronic properties is successfully described by the modelling of curvature and elastic deformations by fictitious gauge fields that have become an ex- perimental reality after the suggestion that Landau levels can form associated to strain in graphene and the subsequent experimental confirmation. Here we propose a device to detect microstresses in graphene based on a scanning-tunneling-microscopy setup able to measure Aharonov-Bohm inter- ferences at the nanometer scale. The interferences to be observed in the local density of states are created by the fictitious magnetic field associated to elastic deformations of the sample.
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