Superconductivity and magnetism in CuBiSO from first principles

I. I. Mazin

doi:10.1103/PhysRevB.81.140508

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Superconductivity and magnetism in CuBiSO from first principles

I. I. Mazin

DOI 10.1103/PhysRevB.81.140508 · Physical Review B

T1

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Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.

Abstract

Cu1−yBiSO was recently reported to superconduct at T≈5.8 K at y≈0.15. Band-structure calculations indicate that the stoichiometric CuBiSO is a band insulator. In this Rapid Communication, I show that the hole-doped (whether in the virtual crystal approximation or with actual Cu vacancies) CuBiSO is on the verge of a ferromagnetic instability (cf. Pd metal) and therefore a conventional superconductivity with Tc∼6 K is quite unlikely. Presumably, the hole-doped CuBiSO is another example of superconductivity mediated by spin fluctuations.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
Cu1-yBiSO Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	5.8	Pressure not reported	unknown
Cu1-yBiSO Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	6	Pressure not reported	unknown