Pezo Armando, Lima Matheus P, Costa Marcio, Fazzio Adalberto
Brazilian Nanotechnology National Laboratory (LNNano, CNPEM), Rua Giusepe Máximo Scalfaro 10000, Campinas, SP 13083-970, Brazil.
Departamento de Física, Universidade Federal de São Carlos, 13565-905 São Carlos, São Paulo, Brazil.
Phys Chem Chem Phys. 2019 Jun 7;21(21):11359-11366. doi: 10.1039/c9cp01590f. Epub 2019 May 21.
Transition metal dichalcogenides (TMDCs) are promising materials for applications in nanoelectronics and correlated fields, where their metallic edge states play a fundamental role in the electronic transport. In this work, we investigate the transport properties of MoS zigzag nanoribbons under a butadiene (CH) atmosphere, as this compound has been used to obtain MoS flakes by exfoliation. We use density functional theory combined with non-equilibrium Green's function techniques, in a methodology contemplating disorder and different coverages. Our results indicate a strong modulation of the TMDC electronic transport properties driven by butadiene molecules anchored at their edges, producing the suppression of currents due to a backscattering process. Our results indicate a high sensitivity of the TMDC edge states. Thus, the mechanisms used to reduce the dimensionality of MoS considerably modify its transport properties.
过渡金属二硫属化物(TMDCs)是纳米电子学及相关领域应用中很有前景的材料,其金属边缘态在电子输运中起着基础性作用。在这项工作中,我们研究了在丁二烯(CH)气氛下MoS锯齿形纳米带的输运性质,因为这种化合物已被用于通过剥离获得MoS薄片。我们采用密度泛函理论结合非平衡格林函数技术,在考虑无序和不同覆盖度的方法中进行研究。我们的结果表明,锚定在其边缘的丁二烯分子对TMDC的电子输运性质有强烈调制作用,由于背散射过程导致电流被抑制。我们的结果表明TMDC边缘态具有高灵敏度。因此,用于大幅降低MoS维度的机制会显著改变其输运性质。