Type-I superconductivity in Al${}_6$Re

Abstract

While the pure elements tend to exhibit Type-I rather than Type-II superconductivity, nearly all compound superconductors are Type-II, with only a few known exceptions. We report single crystal growth and physical characterization of the rhenium aluminide Al${}_6$Re, which we conclude is a Type-I superconductor based on magnetization, ac-susceptibility, and specific-heat measurements. This detection of superconductivity, despite the strong similarity of Al${}_6$Re to a family of W and Mo aluminides that do not superconduct, suggests that these aluminides are an ideal testbed for identifying the relative importance of valence electron count and inversion symmetry in determining whether a material will superconduct.

arXiv comment9 pages, 7 figures, CIF file as ancillary

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Cited by in corpus (11)

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• Type-I superconductivity in noncentrosymmetric NbGe${}_2$
• Superconducting density of states and bandstructure at the surface of the candidate topological superconductor Au2Pb
• An investigation of type-I superconductivity in single crystal of Pb2Pd
• Full superconducting gap and type-I to type-II superconductivity transition in single crystalline NbGe2
• Structural phases of elemental Gallium: universal relations in type-I superconductors
• Linear Magnetoresistance and Type-I Superconductivity in $\beta$-IrSn${}_4$
• A topological flux trap: Majorana bound states at screw dislocations
• Influence of pressure on properties of multi-gap type-I superconductor BeAu
• Magnetotransport in Al6Re
• Unconventional magnetization in the multiphase superconductor PdBi${}_2$