Buttiker probes and the recursive Green's function: An efficient approach to include dissipation in general configurations

Vaitkus, J and Cole, J 2018, 'Buttiker probes and the recursive Green's function: An efficient approach to include dissipation in general configurations', Physical Review B, vol. 97, no. 8, pp. 1-12.


Document type: Journal Article
Collection: Journal Articles

Title Buttiker probes and the recursive Green's function: An efficient approach to include dissipation in general configurations
Author(s) Vaitkus, J
Cole, J
Year 2018
Journal name Physical Review B
Volume number 97
Issue number 8
Start page 1
End page 12
Total pages 12
Publisher American Physical Society
Abstract An efficient and compact approach to the inclusion of dissipative effects in nonequilibrium Green's function (NEGF) simulations of electronic systems is introduced. The algorithm is based on two well-known methods in the literature, first that of the so-called recursive Green's function (RGF) and second that of Büttiker probes. Numerical methods for exact evaluation of the Jacobian are presented by a direct extension to RGF which can be modularly included in any codebase that uses it presently. Then using both physical observations and numerical methods, the computation time of the Büttiker probe Jacobian is improved significantly. An improvement to existing phonon models within Büttiker probes is then demonstrated in the simulation of fully atomistic graphene nanoribbon based field effect transistors in n-i-n and p-i-n operation.
Subject Electronic and Magnetic Properties of Condensed Matter; Superconductivity
DOI - identifier 10.1103/PhysRevB.97.085149
Copyright notice © 2018 American Physical Society
ISSN 2469-9950
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