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1. Atomistic Green’s Functions: The Beauty of Self-energies

   28 Oct 2020 | | Contributor(s):: Tillmann Christoph Kubis

   This presentation gives an introduction to NEGF. It will be explained how self-energies cause NEGF to fundamentally differ from most other quantum methods. Atomistic examples of phonon and impurity scattering self-energies agree quantitatively with experiments.

2. Ripples and Warping of Graphene: A Theoretical Study

   08 Jun 2010 | | Contributor(s):: Umesh V. Waghmare

   We use first-principles density functional theory based analysis to understand formation of ripples in graphene and related 2-D materials. For an infinite graphene, we show that ripples are linked with a low energy branch of phonons that exhibits quadratic dispersion at long wave-lengths. Many...