Full superconducting dome of strong Ising protection in gated monolayer WS2

Jianming Lu, Oleksandr Zheliuk, Qihong Chen, Inge Leermakers, Nigel E. Hussey, Uli Zeitler, Jianting Ye*

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

58 Citations (Scopus)

Abstract

Many recent studies show that superconductivity not only exists in atomically thin monolayers but can exhibit enhanced properties such as a higher transition temperature and a stronger critical field. Nevertheless, besides being unstable in air, the weak tunability in these intrinsically metallic monolayers has limited the exploration of monolayer superconductivity, hindering their potential in electronic applications (e.g., superconductor-semiconductor hybrid devices). Here we show that using field effect gating, we can induce superconductivity in monolayer WS2 grown by chemical vapor deposition, a typical ambient-stable semiconducting transition metal dichalcogenide (TMD), and we are able to access a complete set of competing electronic phases over an unprecedented doping range from band insulator, superconductor, to a reentrant insulator at high doping. Throughout the superconducting dome, the Cooper pair spin is pinned by a strong internal spin-orbit interaction, making this material arguably the most resilient superconductor in the external magnetic field. The reentrant insulating state at positive high gating voltages is attributed to localization induced by the characteristically weak screening of the monolayer, providing insight into many dome-like superconducting phases observed in field-induced quasi-2D superconductors.

Original languageEnglish
Pages (from-to)3551-3556
Number of pages6
JournalProceedings of the National Academy of Sciences of the United States of America
Volume115
Issue number14
DOIs
Publication statusPublished - 3-Apr-2018

Keywords

  • transition metal dichalcogenides
  • Ising superconductivity
  • spin-orbit coupling
  • monolayer
  • ion-gated transistor
  • TRANSITION-METAL DICHALCOGENIDES
  • ELECTRIC-FIELD CONTROL
  • INSULATOR-TRANSITION
  • 2-DIMENSIONAL SUPERCONDUCTOR
  • DIMENSIONAL CROSSOVER
  • TRANSPORT-PROPERTIES
  • GROUND-STATE
  • FESE FILMS
  • MOS2
  • LA2-XSRXCUO4

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