Superconductivity and Magnetism in BiOCuS

Abstract

BiOCu_{1-y}S was recently reported to superconduct at T=5.8 K at y~0.15. Band structure calculations indicate that stoichiometric BiOCuS is a band insulator. In this paper, I show that hole-doped (whether in the virtual crystal approximation or with actual Cu vacancies) BiOCuS is on the verge of a ferromagnetic instability (cf. Pd metal), and therefore conventional superconductivity with Tc~6 K is quite unlikely. Presumably, hole-doped BiOCuS is another example of superconductivity mediated by spin-fluctuations

Final version accepted for publication

References in corpus (1)

• Electronic band structure of novel tetragonal BiOCuS as a parent phase for novel layered superconductors

Cited by in corpus (2)

• Competition between Electron-Phonon coupling and Spin Fluctuations in superconducting hole-doped BiOCuS
• Chemical tuning between triangular and honeycomb structures in a 5$d$ spin-orbit Mott insulator