Sagisaka, K; Nara, J; Bowler, D; (2017) Importance of bulk states for the electronic structure of semiconductor surfaces: implications for finite slabs. Journal of Physics: Condensed Matter , 29 (14) , Article 145502. 10.1088/1361-648X/aa5f91.

Preview

Text 1609.09262.pdf - Accepted Version Download (3MB) | Preview

Abstract

We investigate the influence of slab thickness on the electronic structure of the Si(1 0 0)- p(2 x 2) surface in density functional theory (DFT) calculations, considering both density of states and band structure. Our calculations, with slab thicknesses of up to 78 atomic layers, reveal that the slab thickness profoundly affects the surface band structure, particularly the dangling bond states of the silicon dimers near the Fermi level. We find that, to precisely reproduce the surface bands, the slab thickness needs to be large enough to completely converge the bulk bands in the slab. In the case of the Si(1 0 0) surface, the dispersion features of the surface bands, such as the band shape and width, converge when the slab thickness is larger than 30 layers. Complete convergence of both the surface and bulk bands in the slab is only achieved when the slab thickness is greater than 60 layers.

Download activity - last month

Export as CSVJSONXML

Download activity - last 12 months

Export as CSVJSONXML

Downloads by country - last 12 months

Export as JSONCSVXML

Archive Staff Only

View Item