Alternating Superconducting and Charge Density Wave Monolayers within Bulk 6R-TaS2.
Nano Lett
; 22(15): 6268-6275, 2022 Aug 10.
Article
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| MEDLINE
| ID: mdl-35857927
ABSTRACT
Van der Waals (vdW) heterostructures continue to attract intense interest as a route of designing materials with novel properties that cannot be found in nature. Unfortunately, this approach is currently limited to only a few layers that can be stacked on top of each other. Here, we report a bulk vdW material consisting of superconducting 1H TaS2 monolayers interlayered with 1T TaS2 monolayers displaying charge density waves (CDW). This bulk vdW heterostructure is created by phase transition of 1T-TaS2 to 6R at 800 °C in an inert atmosphere. Its superconducting transition (Tc) is found at 2.6 K, exceeding the Tc of the bulk 2H phase. Using first-principles calculations, we argue that the coexistence of superconductivity and CDW within 6R-TaS2 stems from amalgamation of the properties of adjacent 1H and 1T monolayers, where the former dominates the superconducting state and the latter the CDW behavior.
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MEDLINE
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En
Revista:
Nano Lett
Año:
2022
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Article
País de afiliación:
Reino Unido