Unconventional superconducting symmetry in a checkerboard antiferromagnet studied via renormalized mean-field theory
Huai-Xiang Huang, You-Quan Li, Jing-Yu Gan, Yan Chen, Fu-Chun Zhang
DOI 10.1103/PhysRevB.75.184523 · Physical Review B
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Abstract
We use a renormalized mean-field theory to study the Gutzwiller projected Bardeen-Cooper-Schrieffer states of the extended Hubbard model in the large U limit or the t−t′−J−J′ model on a two-dimensional checkerboard lattice. At small t′∕t, the frustration due to the diagonal terms of t′ and J′ does not alter the dx2−y2-wave pairing symmetry, and the negative (positive) t′∕t enhances (suppresses) the pairing order parameter. At large t′∕t, the ground state has an s−s wave symmetry. At the intermediate t′∕t, the ground state is d+id or d+is wave with time reversal symmetry broken.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| NaxCoO2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| KOs2O6 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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