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Paper   IPM / Physic / 16007
School of Physics
  Title:   Low-loss two-dimensional plasmon modes in antimonene
1.  Z. Torbatian
2.  M. Alidoosti
3.  D. Novko
4.  R. Asgari
  Status:   Published
  Journal: Phys. Rev. B
  Vol.:  101
  Year:  2020
  Pages:   205412
  Supported by:  IPM
The effects of spin-orbit (SOC) and electron-phonon coupling on the collective excitation of doped monolayer Sb2 are investigated using density functional and many-body perturbation theory. The spin-orbit coupling is exclusively important for the monolayer Sb2 and it leads to the reconstruction of the electronic band structure. In particular, plasmon modes of monolayer Sb2 are quite sensitive to the SOC and are characterized by very low damping rates owing to small electron-phonon scatterings. Our results show plasmons in antimonene are significantly less damped compared to monolayer graphene when plasmon energies are ħ ω > 0.2 eV due to smaller plasmon-phonon coupling in the former material.

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