Indexed by: Journal paper

First Author: Yajun Fu

Correspondence Author: Feng Miao,Baigeng Wang,Hongtao Yuan

Co-author: 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

Journal: npj Quantum Materials

Included Journals: SCI

Discipline: Science

First-Level Discipline: Physics

Document Type: J

Volume: 2

Issue: 1

Page Number: 52

ISSN No.: 2397-4648

Date of Publication: 2017-09-12

Impact Factor: 6.856

Abstract: 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.

Links to published journals: https://www.nature.com/articles/s41535-017-0056-1