Single-band Hubbard model for superconductivity and charge-density-wave order in the bismuth oxide superconductors
C. C. Chancey, R. Ramakumar, K. P. Jain
DOI 10.1103/PhysRevB.48.13098 · 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
A model is developed for superconducting and charge-density-wave (CDW) correlations in the bismuth oxide superconductors BaPb1−xBixO3 and Ba1−xKxBiO3, starting from the Hubbard model and assuming a three-dimensional tight-binding band structure. Self-consistent equations for the superconducting gap (Δ), and the CDW gap (g), and the band filling (Ne) are derived and solved numerically. Solutions for both Δ and g are obtained for 0.29≤Ne≤0.38 and 0.80≤Ne≤1.00 (where Ne=1.00 represents half-filling). These solutions are compared against the experimental data for BaPb1−xBixO3 and Ba1−xKxBiO3 and qualitative agreement is obtained.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| BaPb1-xBixO3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 13 | Pressure not reported | onset |
| Ba1-xKxBiO3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 30 | Pressure not reported | onset |
Similar papers
Charge order in BiO2 planes of bismuth-based high-temperature superconductors
similarity 0.95Jan Bal/a & Andrzej M. Oleś
Source status unknown — claims are unverified
Calculations of the electronic structure and superconducting properties of the Ba(K)Pb(Bi)O3 system
similarity 0.94D. A. Papaconstantopoulos et al.
Source status unknown — claims are unverified
Observation of a structural-fluctuation enhancement in the vicinity of superconducting transitions in Ba1−xMxBiO3 (M=K,Rb)
similarity 0.94Y. Koyama et al.
Source status unknown — claims are unverified
Pairing and phase separation in BiO3-based superconductors
similarity 0.94A. A. Aligia & M. Baliña
Source status unknown — claims are unverified
Effective t-J model Hamiltonian parameters of monolayered cuprate superconductors from ab initio electronic structure calculations
similarity 0.94David Muñoz et al.
Source status unknown — claims are unverified
Charge-density waves and superconductivity in the Ba1−xKxBiO3−y system
similarity 0.94Shiyou Pei et al.
Source status unknown — claims are unverified