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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).
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 language | English |
---|---|
Article number | 025020 |
Pages (from-to) | 1-14 |
Number of pages | 14 |
Journal | 2D Materials |
Volume | 11 |
Issue number | 2 |
DOIs | |
Publication status | Published - 13 Feb 2024 |
Keywords / Materials (for Non-textual outputs)
- Superconductivity
- tungsten-sulfur-hydride monolayer
- electron self-energy
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