Valencia-Hoyos, Daniel A.

Publication Search Results

Now showing 1 - 1 of 1

Electron transport through graphene structures
(2012) Valencia-Hoyos, Daniel A.; Jun-Qiang, Lu; College of Arts and Science - Science; Jiménez, Héctor; Ramos, Rafael; Department of Physics; Hajek, Darrell W.
Intrinsic graphene is the first atomic monolayer structure produced experimentally. Its unique two dimensional geometric structure along with its electronic structure (Dirac cone) make it an ideal system for the fundamental exploration of novel physics as well as a promising candidate for nanoelectronic applications. In this thesis, we present theoretical studies on electronic transport properties of different graphene structures, including monolayers, bilayers, mono-bilayers and junctions between mono-bilayers and monolayers. These structures can be viewed as a graphene monolayer covered by another layer of different width. Their transport properties are calculated by the Landauer- Buttiker formalism combined with density functional theory. Our results show that, in such a structure, the electronic transport property of the graphene monolayer can be changed considerably if the other layer is a nanoribbon with finite width; however the change is less significant if the other layer is infinite or even semi-infinite. We further show that the difference of the effects between infinite and finite coverage can be attributed to antiresonance in the electronic transmission, which is caused by interlayer interference between the wavefunctions.