Superconductivity in Potassium-intercalated Td-WTe2

Abstract

To realize topological superconductor is one of the most attracting topics because of its great potential in quantum computation. In this study, we successfully intercalate potassium (K) into the van der Waals gap of type II Weyl semimetal WTe2, and discover the superconducting state in KxWTe2 through both electrical transport and scanning tunneling spectroscopy measurements. The superconductivity exhibits an evident anisotropic behavior. Moreover, we also uncover the coexistence of superconductivity and the positive magneto-resistance state. Structural analysis substantiates the negligible lattice expansion induced by the intercalation, therefore suggesting K-intercalated WTe2 still hosts the topological nontrivial state. These results indicate that the K-intercalated WTe2 may be a promising candidate to explore the topological superconductor.

17 pages, 4 figures

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Cited by in corpus (16)

• Direct evidence for charge compensation induced large magnetoresistance in thin WTe2
• Electron-phonon coupling superconductivity in 2D orthorhombic MB6 (M=Mg, Ca) and hexagonal MB6 (M=Mg, Ca, Sc, Ti, Sr, Y)
• Observation of superconductivity in pressurized Weyl semimetal candidate TaIrTe4
• Two phase transitions driven by surface electron-doping in WTe${}_2$
• Emergent superconductivity by Re doping in type -II Weyl semimetal NiTe2
• Doping-induced superconductivity in the topological semimetal Mo5Si3
• Two Dimensional Multigap Superconductivity in Bulk 2H-TaSSe
• Photon drag of superconducting fluctuations in 2D systems
• Superconducting properties of doped blue phosphorene: Effects of non-adiabatic approach
• Equilibrium current in a Weyl-semimetal - superconductor heterostructure
• Enhanced Superconductivity in 2H-TaS2 Devices Through in-situ Molecular Intercalation
• Metal-insulator-like transition, superconducting dome and topological electronic structure in Ga-doped Re${}_3$Ge${}_7$
• Turning ZrTe5 into semiconductor through atomic intercalation
• Selective observation of surface and bulk bands in polar WTe2 by laser-based spin- and angle-resolved photoemission spectroscopy
• Transport anomalies in the layered compound BaPt4Se6
• Observation of nearly identical superconducting transition temperatures in pressurized Weyl semimetal MIrTe4 (M=Nb and Ta)