Otro
Hybridization effects on the out-of-plane electron tunneling properties of monolayers: is h-BN more conductive than graphene?
Registro en:
Nanotechnology. Bristol: Iop Publishing Ltd, v. 25, n. 34, 7 p., 2014.
0957-4484
10.1088/0957-4484/25/34/345703
WOS:000341807100017
0000-0001-8874-6947
Autor
Zhong, Xiaoliang
Amorim, Rodrigo G.
Rocha, Alexandre R.
Pandey, Ravindra
Resumen
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'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. Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)