Tight-binding approach to understand photoelectron intensity from graphene for circularly polarized light

Abstract

We have investigated the effect of imperfect circular polarization on the angle-resolved photoemission spectroscopy signal, using graphene as a prototypical system that can be understood within tight-binding formalism. We found that perfect left- and right-circularly polarized lights give the same photoelectron intensity distribution around a constant energy contour of the graphene $\pi$ band. On the other hand, upon breaking the purity of the polarization, photoelectron intensity starts to show circular dichroism, which is enhanced with further increasing the imperfection. Our results predict the existence of an additional factor for the circular dichroism observed in the photoemission signal from graphene and hence suggest the importance of experimental conditions to understand circular dichroism observed via photoemission spectroscopy.

References in corpus (7)

• The electronic properties of graphene
• Maximally-localized generalized Wannier functions for composite energy bands
• Tight--binding description of the quasiparticle dispersion of graphite and few--layer graphene
• Characterization of graphene through anisotropy of constant-energy maps in angle-resolved photoemission
• Illuminating the dark corridor in graphene: polarization dependence of angle-resolved photoemission spectroscopy on graphene
• Direct measurement of quantum phases in graphene via photoemission spectroscopy
• Coupling of Nonlocal Potentials to Electromagnetic Fields

Cited by in corpus (4)

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• Kramers-Weyl fermions in the chiral charge density wave material (TaSe${}_4$)${}_2$I
• Realization of intrinsically broken Dirac cones in graphene via the momentum-resolved electronic band structure
• Lippmann-Schwinger Approach for Accurate Photoelectron Wavefunctions and Angle-Resolved Photoemission Spectra from First Principles