High temperature spin-triplet topological superconductivity in K2Cr3As3

Abstract

Spin-triplet superconductors are novel materials capable of harboring Majorana bound states that can be used in topological quantum computing. However, such bulk materials are still rare. Here we review the results that established K2Cr3As3 as a spin-triplet superconductor with transition temperature T_c as high as 6.5 K. We focus on the multiple-phases feature, and its exquisite distance to a ferromagnetic quantum critical point which is likely responsible for the high T_c. We touch on the topological aspect of the superconducting state, and suggest that it is a new route to the technical implementation using a topological spin-triplet superconductor at the highest temperature ever.

arXiv commentBased on an invited talk given at the 35th International Symposium on Superconductivity (ISS 2022, Nov. 29-Dec.1, 2022, Nagoya, Japan)

References in corpus (14)

• Unpaired Majorana fermions in quantum wires
• Non-abelian statistics of half-quantum vortices in p-wave superconductors
• Spin-Rotation Symmetry Breaking in the Superconducting State of CuxBi2Se3
• Spin Triplet Superconducting State due to Broken Inversion Symmetry in Li_2Pt_3B
• Spin-singlet superconductivity with multiple gaps in PrO0.89F0.11FeAs
• 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
• Electronic structure of quasi-one-dimensional superconductor K${}_2$Cr${}_3$As${}_3$ from first-principles calculations
• Spin-Triplet Superconductivity in K2Cr3As3
• Ion-exchange synthesis and superconductivity at 8.6 K of Na2Cr3As3 with quasi-one-dimensional crystal structure
• Superconductivity near Itinerant Ferromagnetic Quantum Criticality
• Tuning the distance to a possible ferromagnetic quantum critical point in A2Cr3As3
• Direction and symmetry transition of the vector order parameter in topological superconductors Cu${}_x$Bi${}_2$Se${}_3$

Cited by in corpus (2)

• Tuning superconducting pairing symmetry via a staggered potential in the doped honeycomb Hubbard model
• Hydrogen Doping Induced $p_x\pm i{p}_y$ Triplet Superconductivity in Quasi-One-Dimensional K${}_2$Cr${}_3$As${}_3$