Berlin 2018 – scientific programme

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HL: Fachverband Halbleiterphysik

HL 23: 2D materials: Graphene and BN (joint session HL/DS)

HL 23.5: Talk

Tuesday, March 13, 2018, 15:00–15:15, A 151

Plasmons and excitons in few layer graphenes — •Jorge Enrique Olivares Peña and Sam Shallcross — FAU Erlangen-Nürnberg

We present a general method for studying plasmons and excitons in low dimensional systems, based on (i) an operator equivalence method to establish a continuum H(r , p) Hamiltonian from a general underlying tight-binding method, and (ii) application of the bootstrap functional within the framework of time dependent density functional theory to study excitonic effects. We apply this method to the graphene twist bilayer, finding that the excitonic correction to the optical absorption spectrum is important in the small angle limit.

[1] S. Shallcros et al., arXiv 1607.00920 (2016)

[2] S. Shallcross et al. , Phys. Rev. B 93,035452 (2016)