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arXiv 1108.4571cond-mat.mes-hall
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石墨烯纳米间隙用于门控量子相干单分子电子学

Graphene Nanogap for Gate Tunable Quantum Coherent Single Molecule Electronics

A. Bergvall, K. Berland, P. Hyldgaard, S. Kubatkin, T. Lofwander

摘要:

我们提出了量子相干电子输运通过富勒烯吡咯烷封端的分子桥接石墨烯纳米间隙的原子计算。我们预测,石墨烯接触可以解决单分子分子电子学中的三个难题:(1)背栅可以调节石墨烯引线中的费米能级,有利于在高开/关电流比的晶体管效应中控制器件电导;(2)与传统的金属接触相比,避免了引线与分子之间的尺寸失配;(3)因此,通过扫描技术可直接检测整个装置中的电荷流图案的不同特征。我们发现,适度的石墨烯边缘无序是不重要的晶体管功能。

英文摘要:

We present atomistic calculations of quantum coherent electron transport through fulleropyrrolidine terminated molecules bridging a graphene nanogap. We predict that three difficult problems in molecular electronics with single molecules may be solved by utilizing graphene contacts: (1) a back gate modulating the Fermi level in the graphene leads facilitate control of the device conductance in a transistor effect with high on/off current ratio; (2) the size mismatch between leads and molecule is avoided, in contrast to the traditional metal contacts; (3) as a consequence, distinct features in charge flow patterns throughout the device are directly detectable by scanning techniques. We show that moderate graphene edge disorder is unimportant for the transistor function.

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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