Kristiāns Čerņevičs^1*, Oleg V. Yazyev^1*

1 Institute of Physics, École Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland

* Corresponding authors emails: kristians.cernevics@epfl.ch, oleg.yazyev@epfl.ch

DOI10.24435/materialscloud:zb-ed [version v1]

Publication date: Sep 01, 2021

How to cite this record

Kristiāns Čerņevičs, Oleg V. Yazyev, Design rules for interconnects based on graphene nanoribbon junctions, Materials Cloud Archive 2021.145 (2021), https://doi.org/10.24435/materialscloud:zb-ed

Description

Graphene nanoribbons (GNRs) produced by means of bottom-up chemical self-assembly are considered promising candidates for the next-generation nanoelectronic devices. We address the electronic transport properties of angled two-terminal GNR junctions, which are inevitable in the interconnects in graphene-based integrated circuits. We construct a library of over 400000 distinct configurations of 60° and 120° junctions connecting armchair GNRs of different widths. Numerical calculations combining the tight-binding approximation and the Green’s function formalism allow identifying numerous junctions with conductance close to the limit defined by the GNR leads. Further analysis reveals underlying structure-property relationships with crucial roles played by the bipartite symmetry of graphene lattice and the presence of resonant states localized at the junction. In particular, we discover and explain the phenomenon of binary conductance in 120° junctions connecting metallic GNR leads that guarantee maximum possible conductance. Overall, our study defines the guidelines for engineering GNR junctions with desired electrical properties.

Materials Cloud sections using this data

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File name	Size	Description
README.txt MD5md5:304af208401fbc4b1e8e166e44794cd9	2.3 KiB	README describing the file structure of the raw data
Supplementary_Tables.zip MD5md5:99d9c4889a70796527aff936584089ef	2.6 GiB	Zip file containing the supplementary tables in PDF format
Raw_data_and_plots.zip MD5md5:c6e61e070d7cde74854cd731df0f9523	12.4 GiB	Zip file containing the raw data

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Keywords

GNR Graphene Nanoribbon Junctions Electronic transport SNSF