Weak phonon-mediated pairing in BiS2 superconductor from first principles
Corentin Morice, Ryosuke Akashi, Takashi Koretsune, Siddharth S. Saxena, Ryotaro Arita
DOI 10.1103/PhysRevB.95.180505 · Physical Review B
Active bibliographic source — not scientific approval
Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.
Abstract
Superconductivity in novel bismuth-sulfur superconductors has attracted large research efforts, both experimental and theoretical, but a consensus on the nature of superconductivity in these materials has yet to be reached. Using density functional theory for superconductors, we study the electron-phonon pairing mechanism in LaO0.5F0.5BiS2. We first confirm the presence of a commensurate charge density wave instability, in accordance with previous studies. Using a recently developed integration scheme for the electron-phonon coupling, we found that its strength is much lower than previously calculated, due to improved density of states calculations. We finally conclude that conventional phonon-mediated pairing cannot explain the high superconducting transition temperatures observed in this material.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| LaO0.5F0.5BiS2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| La(O,F)BiS2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 10.6 | Pressure not reported | unknown |
Similar papers
Charge and quadrupole fluctuations and gap anisotropy in BiS2-based superconductors
similarity 0.96Katsuhiro Suzuki et al.
Source status unknown — claims are unverified
Weak phonon-mediated pairing in BiS superconductor from first principles
similarity 0.96Corentin Morice et al. · 2017 · arXiv:1701.02909
Source status unknown — claims are unverified
Ferroelectric soft phonons, charge density wave instability, and strong electron-phonon coupling in BiS2 layered superconductors: A first-principles study
similarity 0.95T. Yildirim
Source status unknown — claims are unverified
Crystal structure, lattice vibrations, and superconductivity of LaO1−xFxBiS2
similarity 0.95J. Lee et al.
Source status unknown — claims are unverified
Electron-phonon superconductivity near charge-density-wave instability in LaO0.5F0.5BiS2: Density-functional calculations
similarity 0.95Xiangang Wan et al.
Source status unknown — claims are unverified
Raman scattering investigation of the electron-phonon coupling in superconducting Nd(O,F)BiS2
similarity 0.95S. F. Wu et al.
Source status unknown — claims are unverified