Understanding the origin of superconducting dome in electron-doped MoS$_2$ monolayer

Nina Girotto Erhardt; Jan Berges; Samuel Poncé; Dino Novko

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arXiv · 2412.02822

Understanding the origin of superconducting dome in electron-doped MoS$_2$ monolayer

Nina Girotto Erhardt·Jan Berges·Samuel Poncé·Dino Novko

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Abstract

We investigate the superconducting properties of molybdenum disulphide (MoS$_2$) monolayer across a broad doping range, successfully recreating the so far unresolved superconducting dome. Our first-principles findings reveal several dynamically stable phases across the doping-dependent phase diagram. We observe a doping-induced increase in the superconducting transition temperature $T_c$, followed by a reduction in $T_c$ due to the formation of charge density waves (CDWs), polaronic distortions, and structural transition from the H to the 1T$'$ phase. Our work reconciles various experimental observations of CDWs in MoS$_2$ with its doping-dependent superconducting dome structure, which occurs due to the $1\times 1$ H to $2\times 2$ CDW phase transition.

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Nina Girotto Erhardt, Jan Berges, Samuel Poncé, Dino Novko. 2024-12-03. Understanding the origin of superconducting dome in electron-doped MoS$_2$ monolayer. https://arxiv.org/abs/2412.02822

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