Hybridization effects on the out-of-plane electron tunneling properties of monolayers: is h-BN more conductive than graphene?

作者：Zhong Xiaoliang^*; Amorim Rodrigo G; Rocha Alexandre R; Pandey Ravindra

来源：Nanotechnology, 2014, 25(34): 345703.

DOI：10.1088/0957-4484/25/34/345703

• BN monolayer
• electron transport
• graphene

Electron transport properties through multilayers of hexagonal boron nitride (h-BN) sandwiched between gold electrodes is investigated by density functional theory together with the non-equilibrium Green%26apos;s function method. The calculated results find that despite graphene being a gapless semimetal and h-BN two-dimensional layer being an insulator, the transmission function perpendicular to the atomic layer plane in both systems is nearly identical. The out-of-plane tunnel current is found to be strongly dependent on the interaction at the interface of the device. As a consequence, single layer h-BN coupled with atomically flat weakly interacting metals such as gold may not work as a good dielectric material, but the absence of sharp resonances would probably lead to more stable out-of-plane electronic transport properties compared to graphene.

• 出版日期2014-8-29