Superconductivity and electron self-energy in tungsten-sulfur-hydride monolayer

J Seeyangnok, M M UI Hassan, U Pinsook*, GJ Ackland

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract / Description of output

Hydrogen-rich structures have recently gained attention as a candidate
for room-temperature superconductors. Hydrogen has high phonon frequencies and can be an ideal component for superconductors if it also exhibits strong electron-phonon coupling. In bulk materials, this has been achieved only under very high pressure. Two-dimensional (2D) hydrogen-decorated materials can also be expected to become superconductors. Recently, it was shown that a Janus MoSH monolayer can be synthesized [1], and a theoretical investigation of this MoSH monolayer claimed that Tc = 28.58K at atmospheric pressure [2]. In this work, we propose that tungsten sulfur hydride (WSH) is also a superconducting Janus monolayer. The Tc is carefully calculated with very high resolution via the Eliashberg spectral function and the electron self-energy. We find that WSH is a conventional BCS superconductor with Tc = 12.2K at ambient pressure. For practical applications, sensitive dependence on substrate is inferred. We also reported the electron self-energy of WSH, which can be compared directly with future measurements from angle-resolved photoelectron
spectroscopy (ARPES).
Original languageEnglish
Article number025020
Pages (from-to)1-14
Number of pages14
Journal2D Materials
Issue number2
Publication statusPublished - 13 Feb 2024

Keywords / Materials (for Non-textual outputs)

  • Superconductivity
  • tungsten-sulfur-hydride monolayer
  • electron self-energy


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