Physics – Condensed Matter – Superconductivity
Scientific paper
2008-09-30
Phys. Rev. B 80, 214529 (2009)
Physics
Condensed Matter
Superconductivity
Improved figures, added discussions, added references. Published version. 12 pages, 5 figures, 6 tables
Scientific paper
10.1103/PhysRevB.80.214529
The renormalization-group theory of the d=3 tJ model is extended to further-neighbor antiferromagnetic or electron-hopping interactions, including the ranges of frustration. The global phase diagram of each model is calculated for the entire ranges of temperatures, electron densities, and further/first-neighbor interaction strength ratios. In addition to the \tau_{tJ} phase seen in earlier studies of the nearest-neighbor d=3 tJ model, the \tau_{Hb} phase seen before in the d=3 Hubbard model appears both near and away from half-filling. These distinct \tau phases potentially correspond to different (BEC-like and BCS-like) superconducting phases.
Berker Nihat A.
Hinczewski Michael
Kaplan Nadir C.
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