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arXiv 1907.09079cond-mat.mes-hall
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用于谷电子学的应变石墨烯中的谷同位旋操纵

Manipulation of Valley Isospins in Strained Graphene for Valleytronics

Nojoon Myoung, Hyungkook Choi, Hee Chul Park

摘要:

石墨烯出色的机械性能有助于应变工程,允许未来的谷电子和纳米机电应用。在这项工作中,我们已经发现,在石墨烯pn结上的高斯形应变导致量子霍尔电导振荡由于在石墨烯扶手椅边缘的谷isospins之间的旋转角。此外,额外的Fano共振观察到的值的应变诱导的伪磁场的方法,外部磁场。由实磁场和伪磁场之间的相互作用产生的提升的谷简并导致清楚的谷分辨Fano共振。探索应变工程作为一种手段,以控制电导通过谷同位旋操纵被认为是打开大门,以潜在的石墨烯valleytronic设备。

英文摘要:

Graphene's outstanding mechanical properties lend to strain engineering, allowing for future valleytronics and nanoelectromechanic applications. In this work, we have found that a Gaussian-shaped strain on a graphene p-n junction results in quantum Hall conductance oscillations due to the rotated angle between valley isospins at the graphene armchair edges. Furthermore, additional Fano resonances were observed as the value of the strain-induced pseudo-magnetic field approaches that of the external magnetic field. The lifted valley degeneracy, stemming from the interplay between the real and pseudo-magnetic fields, results in clearly valley-resolved Fano resonances. Exploring strain engineering as a means to control conductance through valley isospin manipulation is believed to open the door to potential graphene valleytronic devices.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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