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/lp/iop-publishing/enhanced-superconductivity-with-interlayer-spacing-dependent-t-c-in-GprUIBmAQ7
- Publisher
- IOP Publishing
- Copyright
- © 2022 IOP Publishing Ltd
- eISSN
- 2053-1583
- DOI
- 10.1088/2053-1583/ac8ec0
- Publisher site
- See Article on Publisher Site
Abstract
Manipulating the strength of the interlayer coupling is an effective strategy to induce intriguing properties in layered materials. Recently, enhanced superconductivity has been reported in Weyl semimetal MoTe2 and WTe2 via ionic liquid (IL) cation intercalation. However, how the superconductivity enhancement depends on the interlayer interaction still remains elusive. Here by inserting IL cations with different sizes into MoTe2 through this strategy, we are able to tune the interlayer spacing of the intercalated MoTe2 samples and reveal the dependence of superconducting transition temperature Tc on the interlayer spacing. Our results show that Tc increases with the interlayer spacing, suggesting that the weakened interlayer coupling plays an important role in the superconductivity. Interestingly, the intercalation induced superconductivity shows a high Ginzburg–Landau anisotropy, which suggests a quasi-two-dimensional nature of the superconductivity where the adjacent superconducting layers are coupled through Josephson tunnelling.
Journal
2D Materials – IOP Publishing
Published: Oct 1, 2022
Keywords: Weyl semimetal MoTe2 ; superconductivity; ionic liquid; intercalation; interlayer coupling; anisotropic superconductivity