Electronic Transport in Graphene Nanoribbons
P. Brandimarte, M. Engelund, N. Papior, A. Garcia-Lekue, T. Frederiksen, and D. Sánchez-Portal J. Chem. Phys. 146, 092318 (2017)
Motivation of the modeling:
The aim of this study is to identify realistic conditions for which an explored prototype semiconducting device can act as a mechanically controllable electronic beam splitter with possible applications in carbon-based quantum electronic circuits and electron optics.
Achievements of the model:
Detailed characterization of the roles of intersection angle, stacking order, inter-GNR separation, GNR width, and finite voltages on the transport characteristics of the device under study.
Device comprised of a 4-terminal junction defined by two infinite H-passivated AGNRs rotated by an angle θ with respect to each other. Electronic and transport properties of the device are studied with the SIESTA/TranSIESTA codes.
The following device properties are characterized:
- Band Structure
- Transmission functions
- Distribution of the Electrostatic Potential
- Current flow
Daniel Sánchez-Portal, SIMUNE’s collaborator within the RETOS project and member of the core development team of the SIESTA code, is one of the authors of this work.