Low-loss two-dimensional plasmon modes in antimonene

Abstract

The effects of spin-orbit (SOC) and electron-phonon coupling on the collective excitation of doped monolayer Sb${}_2$ are investigated using density functional and many-body perturbation theories. The spin-orbit coupling is exclusively important for the monolayer Sb${}_2$ and it leads to the reconstruction of the electronic band structure. In particular, plasmon modes of monolayer Sb${}_2$ 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 $\hslash \omega >0.2$ eV due to smaller plasmon-phonon coupling in the former material.

arXiv comment10 pages, 10 figures

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Cited by in corpus (3)

• Tunable Low-Loss Hyperbolic Plasmon Polaritons in a T${}_d$-WTe${}_2$ Single Layer
• Hyperbolic plasmon modes in tilted Dirac cone phases of borophene
• Superconducting properties of doped blue phosphorene: Effects of non-adiabatic approach