Physics – Condensed Matter – Superconductivity
Scientific paper
2008-06-23
Physical Review B 78 035132 (2008)
Physics
Condensed Matter
Superconductivity
Scientific paper
10.1103/PhysRevB.78.035132
Using a combined local density functional theory (LDA-DFT) and quantum Monte Carlo (QMC) dynamic cluster approximation approach, the parameter dependence of the superconducting transition temperature Tc of several single-layer hole-doped cuprate superconductors with experimentally very different Tcmax is investigated. The parameters of two different three-band Hubbard models are obtained using the LDA and the downfolding Nth-order muffin-tin orbital technique with N=0 and 1 respectively. QMC calculations on 4-site clusters show that the d-wave transition temperature Tc depends sensitively on the parameters. While the N=1 MTO basis set which reproduces all three $pd\sigma$ bands leads to a d-wave transition, the N=0 set which merely reproduces the LDA Fermi surface and velocities does not.
Andersen Ole Krogh
Jarrell Mark
Jepsen Ove
Kent Paul R. C.
Macridin Alexandru
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