论文类型：期刊论文
第一作者：Yajun Fu
通讯作者：Feng Miao,Baigeng Wang,Hongtao Yuan
合写作者：Harold Y Hwang,Yi Cui,Shou-Cheng Zhang,Miao Wang,Chen Pan,Anyuan Gao,Wei Zhou,Yaojia Wang,Zhuoyu Chen,Junwen Zeng,Kang Xu,Gang Xu,Biao Lian,Peizhe Tang,Erfu Liu
发表刊物：npj Quantum Materials
收录刊物：SCI
学科门类：理学
一级学科：物理学
文献类型：J
卷号：2
期号：1
页面范围：52
ISSN号：2397-4648
发表时间：2017-09-12
影响因子：6.856
摘要：Superconductors at the atomic two-dimensional limit are the focus of an enduring fascination in the condensed matter community. This is because, with reduced dimensions, the effects of disorders, fluctuations, and correlations in superconductors become particularly prominent at the atomic two-dimensional limit; thus such superconductors provide opportunities to tackle tough theoretical and experimental challenges. Here, based on the observation of ultrathin two-dimensional superconductivity in monolayer and bilayer molybdenum disulfide (MoS2) with electric-double-layer gating, we found that the critical sheet carrier density required to achieve superconductivity in a monolayer MoS2 flake can be as low as 0.55 × 1014 cm−2, which is much lower than those values in the bilayer and thicker cases in previous report and also our own observations. Further comparison of the phonon dispersion obtained by ab initio calculations indicated that the phonon softening of the acoustic modes around the M point plays a key role in the gate-induced superconductivity within the Bardeen–Cooper–Schrieffer theory framework. This result might help enrich the understanding of two-dimensional superconductivity with electric-double-layer gating.
发布期刊链接：https://www.nature.com/articles/s41535-017-0056-1