Journal
JOURNAL OF COMPUTATIONAL ELECTRONICS
Volume 12, Issue 2, Pages 232-247Publisher
SPRINGER
DOI: 10.1007/s10825-013-0459-6
Keywords
NEGF; RGFA; Graphene; Electron 'optics'
Funding
- INDEX-NRI
- Directorate For Engineering
- Div Of Chem, Bioeng, Env, & Transp Sys [1134311] Funding Source: National Science Foundation
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We describe the numerical modeling of current flow in graphene heterojunctions, within the Keldysh Landauer Non-equilibrium Green's function (NEGF) formalism. By implementing a k-space approach along the transverse modes, coupled with partial matrix inversion using the Recursive Green's function Algorithm (RGFA), we can simulate on an atomistic scale current flow across devices approaching experimental dimensions. We use the numerical platform to deconstruct current flow in graphene, compare with experimental results on conductance, conductivity and quantum Hall, and deconstruct the physics of electron 'optics' and pseudospintronics in graphene pn junctions. We also demonstrate how to impose exact open boundary conditions along the edges to minimize spurious edge reflections.
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