Theoretical investigation of the quasiparticle dispersion of bilayer high-Tc superconductors
Jian-Xin Li, T. Zhou, Z. D. Wang
DOI 10.1103/PhysRevB.72.094515 · Physical Review B
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Abstract
The renormalization of quasiparticle (QP) dispersion in bilayer high-Tc cuprates is investigated theoretically by examining, respectively, the interactions of the QP with spin fluctuations and phonons. It is illustrated that both interactions are able to give rise to a kink in the dispersion around the antinodes [near (π,0)]. However, remarkable differences between the two cases are found for the peak/dip/hump structure in the line shape, the QP weight, and the interlayer coupling effect on the kink, which are suggested to serve as a discriminance to single out the dominant interaction in the superconducting state. A comparison to recent photoemission experiments shows clearly that the coupling to the spin resonance is dominant for the QP around antinodes in bilayer systems.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Bi2201 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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