Peculiar properties of Cr${}_3$As${}_3$-chain-based superconductors

Abstract

$A_2$Cr${}_3$As${}_3$ ($A$ = K, Rb, Cs) are the unique Cr-based ambient-pressure superconductors to date discovered by serendipity in 2015. The new superconducting family are structurally characterized by quasi one-dimensional [(Cr${}_3$As${}_3$)${}^{2-}$]${}_{\infty }$ double-walled subnanotubes, which exhibit peculiar properties that mostly point to unconventional superconductivity. In this conference paper, we first describe how the superconductors were discovered. Then we overview the recent progresses on crystal structure, electronic structures, theoretical models, and various physical properties in $A_2$Cr${}_3$As${}_3$. Some new experimental results are included. Finally we conclude by addressing the related open questions in this emerging subfield of superconductivity.

19 pages, 9 figures and 1 table, submitted to Philosophical Magzine

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Cited by in corpus (9)

• Spin-Triplet Superconductivity in K2Cr3As3
• Exploring Topological Superconductivity in Topological Materials
• Multiband one-dimensional electronic structure and spectroscopic signature of Tomonoga-Luttinger liquid behavior in K${}_2$Cr${}_3$As${}_3$
• Gapless spin-excitations in the superconducting state of a quasi-one-dimensional spin-triplet superconductor
• Lifshitz transition enhanced triplet $p_z$-wave superconductivity in hydrogen doped KCr${}_3$As${}_3$
• The upper critical field and its anisotropy in RbCr${}_3$As${}_3$
• Superconductivity in the pressure-amorphized topological insulator CrP${}_4$
• 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