K2Mo3As3 is a Multi-Gap Electron-Phonon Superconductor

Abstract

We show using density functional calculations that quasi-one-dimensional K2Mo3As3, which is closely related to the K2Cr3As3 and has very similar superconducting properties, is not close to magnetism and has conventional s-wave electron-phonon superconductivity. This superconductivity is of multi-gap character due to different coupling on different Fermi surface sheets. This is discussed in relation to the properties of this family of quasi-one-dimensional pnictide superconductors. The results show that this family of superconductors provides a unique opportunity for studying the interplay of spin-fluctuations and electron-phonon superconductivity in transition metal pnictides and offer a path for sorting out the different proposed superconducting scenarios in this fascinating family of pnictide superconductors.

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Cited by in corpus (5)

• Gapless spin-excitations in the superconducting state of a quasi-one-dimensional spin-triplet superconductor
• Electronic and dynamical properties of cobalt monogermanide CoGe phases under pressure
• The pairing symmetry in quasi-one-dimensional superconductor Rb2Mo3As3
• Magnetic instabilities in quasi-one-dimensional Cr-based material
• A magnetic excitation linking quasi-1D Chevrel-type selenide and arsenide superconductors