SCIENCE SPIN-OFFS

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Superconductivity
Electron-phonon properties and superconductivity of doped antimonene

A. V. Lugovskoi, M. I. Katsnelson, A. N. Rudenko
(Submitted on 21 Jun 2018)

Antimonene is a recently discovered two-dimensional semiconductor with exceptional environmental stability, high carrier mobility, and strong spin-orbit interactions. In combination with electric field, the latter provides an additional degree of control over the materials' properties because of induced spin splitting. Here, we report on a computational study of electron-phonon coupling and superconductivity in n- and p-doped antimonene, where we pay a special attention on the effect of the perpendicular electric field. We find that at realistic carrier concentrations, antimonene can be turned into a state with strong electron-phonon coupling, with the mass enhancement factor ? of up to five. In this regime, antimonene is expected to be a superconductor with the critical temperature of ~17 K. Application of bias voltage leads to a considerable modification of the electronic structure, affecting the electron-phonon coupling in antimonene. While these effects are less obvious in case of electron-doping, field-effect in hole-doped antimonene results in a considerable variation of the critical temperature depending on bias voltage.

https://arxiv.org/abs/1806.08203