Enhanced superconductivity with interlayer spacing dependent T c in intercalated Weyl semimetal MoTe 2
Source abstract
Abstract
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 MoTe 2 and WTe 2 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 MoTe 2 through this strategy, we are able to tune the interlayer spacing of the intercalated MoTe 2 samples and reveal the dependence of superconducting transition temperature T c on the interlayer spacing. Our results show that T c 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.
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Research context
OpenAlex topics: Iron-based superconductors research · 2D Materials and Applications · Electronic and Structural Properties of Oxides
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