Competition between electron-phonon coupling and spin fluctuations in superconducting hole-doped CuBiSO
Luciano Ortenzi, Silke Biermann, Ole Krogh Andersen, I. I. Mazin, Lilia Boeri
DOI 10.1103/PhysRevB.83.100505 · Physical Review B
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Abstract
CuBiSO is a band insulator that becomes metallic upon hole doping. Superconductivity was recently reported in doped Cu1−xBiSO and attributed to spin fluctuations as the pairing mechanism. Based on first-principles calculations of the electron-phonon coupling, we argue that the latter is very strong in this material, and probably drives superconductivity. The critical temperature is, however, strongly depressed by the proximity to magnetism. Thus Cu1−xBiSO is a quite unique compound where both a conventional phonon-driven and an unconventional triplet superconductivity are possible, and compete with each other. We argue that, in this material, it may be possible to switch from conventional to unconventional superconductivity by varying such parameters as doping or pressure.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Cu0.9BiSO Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 5.8 | Pressure not reported | unknown |
| Cu0.9BiSO Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 33 | Pressure not reported | unknown |
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