A Symmetric Superconducting Dome Hosts Non-Fermi Liquid Behavior at Optimal Doping in MoS2

Qiao Chen; Chengyu Yan; Dino Novko; Changshuai Lan; Huiqin Jian; Yi Yan; Xinming Zhao; Yihang Li; Huai Guan; Bo Gao; Zhong Wan; Shun Wang

arXiv · 2512.20207

A Symmetric Superconducting Dome Hosts Non-Fermi Liquid Behavior at Optimal Doping in MoS2

Qiao Chen·Chengyu Yan·Dino Novko·Changshuai Lan·Huiqin Jian·Yi Yan·Xinming Zhao·Yihang Li·Huai Guan·Bo Gao·Zhong Wan·Shun Wang

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Abstract

The similarities between the phase diagrams of ionic liquid-gated transition metal dichalcogenides (TMDCs) and high-temperature superconductors have garnered considerable interest due to the presence of a superconducting dome with a non-monotonic dependence of the superconducting order parameter as a function of charge carrier density. However, the lack of a complete superconducting dome and insights into the normal state in ionic liquid-gated TMDCs prevents a detailed mapping between the two systems. In this work, we obtain a symmetric superconducting dome that extends from deep underdoped regime all the way to deep overdoped regime in ionic liquid gated MoS2 with a refined gating protocol. We demonstrate that the dome is anticorrelated with the evolution of non-Fermi liquid behavior in the normal states. The scattering rate in the non-Fermi liquid regime can reach Planckian limit. The results may shed light on the emergence of superconductivity in TMDCs.

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Qiao Chen, Chengyu Yan, Dino Novko, Changshuai Lan, Huiqin Jian, Yi Yan, Xinming Zhao, Yihang Li, Huai Guan, Bo Gao, Zhong Wan, Shun Wang. 2025-12-23. A Symmetric Superconducting Dome Hosts Non-Fermi Liquid Behavior at Optimal Doping in MoS2. https://arxiv.org/abs/2512.20207

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