Effect of microscopic scattering on the nonlinear transmission of terahertz fields through monolayer graphene

L. G. Helt and M. M. Dignam
Phys. Rev. B 99, 115413 – Published 11 March 2019

Abstract

We consider the nonlinear terahertz response of n-doped monolayer graphene at room temperature using a microscopic theory of carrier dynamics. Our tight-binding model treats the carrier-field interaction in the length gauge, includes phonon as well as short-range neutral-impurity scattering, and fully accounts for the intrinsic nonlinear response of graphene near the Dirac point. Treating each interaction microscopically allows us to separate contributions from current clipping, phonon creation, and elastic impurity scattering. Although neutral impurity scattering and phonon scattering are both highly energy dependent, we find that they impact conduction-band electron dynamics very differently, and that together they can help explain experimental results concerning field-dependent terahertz transmission through graphene.

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  • Received 7 November 2018

DOI:https://doi.org/10.1103/PhysRevB.99.115413

©2019 American Physical Society

Physics Subject Headings (PhySH)

  1. Physical Systems
Condensed Matter, Materials & Applied Physics

Authors & Affiliations

L. G. Helt and M. M. Dignam

  • Department of Physics, Engineering Physics and Astronomy, Queen's University, Kingston, Ontario K7L 3N6, Canada

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Issue

Vol. 99, Iss. 11 — 15 March 2019

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