Enhanced anisotropic superconductivity in the topological nodal-line semimetal InxTaS2

Abstract

Coexistence of topological bands and charge density wave (CDW) in topological materials has attracted immense attentions because of their fantastic properties, such as axionic-CDW, three-dimensional quantum Hall effect, etc. In this work, a nodal-line semimetal InxTaS2 characterized by CDW and superconductivity is successfully synthesized, whose structure and topological bands (two separated Wely rings) are similar to In0.58TaSe2. A 2 x 2 commensurate CDW is observed at low temperature in InxTaS2, identified by transport properties and STM measurements. Moreover, superconductivity emerges below 0.69 K, and the anisotropy ratio of upper critical field [Gamma = H||ab c2(0)=H||c c2(0)] is significantly enhanced compared to 2H-TaS2, which shares the same essential layer unit. According to the Lawrence-Doniach model, the enhanced Gamma may be explained by the reduced effective mass in kx-ky plane, where Weyl rings locate. Therefore, this type of layered topological systems may offer a platform to investigate highly anisotropic superconductivity and to understand the extremely large upper critical field in the bulk or in the two-dimensional limit.

Accepted for publication in PRB

References in corpus (11)

• Weyl semimetal phase in non-centrosymmetric transition metal monophosphides
• Topological nodal line semimetals
• Nearly Isotropic superconductivity in (Ba,K)Fe2As2
• Pressure induced Superconductivity in Topological Compound Bi2Te3
• Critical Fields and Anisotropy of NdO0.82F0.18FeAs Single Crystals
• Exploring Topological Superconductivity in Topological Materials
• Possible strain induced Mott gap collapse in 1T-TaS${}_2$
• Extreme anisotropy and anomalous transport properties of heavily electron doped Lix(NH3)yFe2Se2 single crystals
• Emergence of Topological Nodal Lines and Type II Weyl Nodes in Strong Spin--Orbit Coupling System InNbX2(X=S,Se)
• Anisotropic Superconductivity of Ca1-xLaxFeAs2 (x ~ 0.18) Single Crystal
• Anisotropic, Intermediate Coupling Superconductivity in Cu0.03TaS2

Cited by in corpus (10)

• Superconductivity and charge-density wave formation in lithium intercalated 2H-LixTaS2
• Nodal topological superconductivity in nodal-line semimetals
• Anisotropic superconductivity in topological crystalline metal Pb${}_{1/3}$TaS${}_2$ with multiple Dirac fermions
• Quasi-two-dimensional anisotropic superconductivity in Li intercalated 2H-TaS${}_2$
• Kramers nodal lines in intercalated TaS${}_2$ superconductors
• Fragile topology in nodal-line semimetal superconductors
• Gapless Topological Peierls-like instabilities in more than one dimension
• Nodal-line semimetals and their variance
• Growth and hydrostatic-pressure study of a type-II superconductor Bi${}_2$Ta${}_3$S${}_6$ single crystal
• Breaking the Trade-off: Bulk 2D Ising Superconductivity with High Tc and Giant Interlayer Spacing via a Unique Chain Intercalation in (BaS)1/3TaS2