Superconductivity at 5 K in quasi-one-dimensional Cr-based KCr3As3 single crystals

Abstract

Recently a new family of Cr-based A2Cr3As3 (A = K, Rb, Cs) superconductors were reported, which own a rare quasi-one-dimensional (Q1D) crystal structure with infinite (Cr3As3)2- chains and exhibit intriguing superconducting characteristics possibly derived from spin-triplet electron pairing. The crystal structure of A2Cr3As3 is actually a slight variation of the hexagonal TlFe3Te3 prototype although they have different lattice symmetry. Here we report superconductivity in a 133-type KCr3As3 compound that belongs to the latter structure. The single crystals of KCr3As3 were prepared by the deintercalation of K ions from K2Cr3As3 crystals which were grown from a high-temperature solution growth method, and it owns a centrosymmetric lattice in contrast to the non-centrosymmetric K2Cr3As3. After annealing at a moderate temperature, the KCr3As3 crystals show bulk superconductivity at 5 K revealed by electrical resistivity, magnetic susceptibility and heat capacity measurements. The discovery of this KCr3As3 superconductor provides a different structural instance to study the exotic superconductivity in these Q1D Cr-based superconductors.

References in corpus (8)

• Superconductivity in the vicinity of antiferromagnetic order in CrAs
• Superconductivity in quasi-one-dimensional K${}_2$Cr${}_3$As${}_3$ with significant electron correlations
• Unconventional superconductivity in quasi-one-dimensional Rb${}_2$Cr${}_3$As${}_3$
• Superconductivity in quasi-one-dimensional Cs2Cr3As3 with large interchain distance
• Superconductivity of 2.2 K under Pressure in Helimagnet CrAs
• Anisotropic $H_{c2}$, thermodynamic and transport measurements, and pressure dependence of $T_c$ in K${}_2$Cr${}_3$As${}_3$ single crystals
• Magnetism in Quasi-One-Dimensional A${}_2$Cr${}_3$As${}_3$ (A=K,Rb) superconductors
• Cluster spin-glass ground state in quasi-one-dimensional KCr${}_3$As${}_3$

Cited by in corpus (12)

• Pressure-induced superconductivity up to 9 K in the quasi-one-dimensional KMn6Bi5
• Superconductivity at 7.3 K in the 133-type Cr-based RbCr3As3 single crystals
• Electronic structures of quasi-one-dimensional cuprate superconductors Ba${}_2$CuO${}_{3+\delta }$
• Structural Instability and Magnetism of Superconducting KCr${}_3$As${}_3$
• Gapless spin-excitations in the superconducting state of a quasi-one-dimensional spin-triplet superconductor
• First order transition in trigonal structure $\text{Ca}{\text{Mn}}_2{\text{P}}_2$
• Absence of superconductivity in electron-doped chromium pnictides ThCrAsN${}_{1-x}$O${}_x$
• The upper critical field and its anisotropy in RbCr${}_3$As${}_3$
• Pressure-induced superconductivity in itinerant antiferromagnet CrB2
• Single crystal growth and superconductivity in RbNi${}_2$Se${}_2$
• Hydrogen Doping Induced $p_x\pm i{p}_y$ Triplet Superconductivity in Quasi-One-Dimensional K${}_2$Cr${}_3$As${}_3$
• Topological $p_z$-wave nodal-line superconductivity with flat surface bands in the AH${}_x$Cr${}_3$As${}_3$ (A=Na, K, Rb, Cs) superconductors