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arXiv · 1809.09214

Plasmon Spectrum of Single Layer Antimonene

Guus Slotman·Alexander Rudenko·Edo van Veen·Mikhail I. Katsnelson·Rafael Roldán·Shengjun Yuan
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Abstract

The collective excitation spectrum of two-dimensional (2D) antimonene is calculated beyond the low energy continuum approximation. The dynamical polarizability is computed using a 6-orbitals tight-binding model that properly accounts for the band structure of antimonene in a broad energy range. Electron-electron interaction is considered within the random phase approximation. The obtained spectrum is rich, containing the standard intra-band 2D plasmon and a set of single inter-band modes. We find that spin-orbit interaction plays a fundamental role in the reconstruction of the excitation spectrum, with the emergence of novel inter-band branches in the continuum that interact with the plasmon.

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Guus Slotman, Alexander Rudenko, Edo van Veen, Mikhail I. Katsnelson, Rafael Roldán, Shengjun Yuan. 2018-09-26. Plasmon Spectrum of Single Layer Antimonene. https://doi.org/10.1103/physrevb.98.155411

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