Crossover from inelastic magnetic scattering of Cooper pairs to spin-wave dispersion produces the low-energy kink structure in the spectra of cuprate superconductors

Tanmoy Das; R. S. Markiewicz; A. Bansil

doi:10.1103/PhysRevB.85.144526

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Crossover from inelastic magnetic scattering of Cooper pairs to spin-wave dispersion produces the low-energy kink structure in the spectra of cuprate superconductors

Tanmoy Das, R. S. Markiewicz, A. Bansil

DOI 10.1103/PhysRevB.85.144526 · Physical Review B

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Abstract

We present GW-based-self-energy calculations for the state of the coexisting spin-density-wave and d-wave superconductivity in a series of cuprate superconductors. The spin-resonance spectrum is found to exhibit the typical “hourglass” form whose upward and downward dispersion branches come from the gapped-spin-wave and magnetic scattering, of Cooper pairs, respectively. We show that the crossover between these two different dispersion features leads to an abrupt change of slope in the quasiparticle self-energy, and hence, the low-energy kink commences in the single-particle quasiparticle spectrum. The calculated electron-boson-coupling strength agrees well with experimental data as a function of temperature, doping, and material. The results demonstrate that electronic correlations dominate the quasiparticle spectra of cuprates near the low-energy kink, suggesting a relatively smaller role for phonons in this energy range.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
La2-xSrxCuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	18	Pressure not reported	unknown
La2-xSrxCuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	30	Pressure not reported	unknown
La2-xSrxCuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	40	Pressure not reported	unknown
La2-xSrxCuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	37	Pressure not reported	unknown
La2-xSrxCuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	26	Pressure not reported	unknown
Nd2-xCexCuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	24	Pressure not reported	unknown
Bi2Sr2CaCu2O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	55	Pressure not reported	unknown
Bi2Sr2CaCu2O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	65	Pressure not reported	unknown
Bi2Sr2CaCu2O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	91	Pressure not reported	unknown
Bi2Sr2CaCu2O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	70	Pressure not reported	unknown
Bi2Sr2CaCu2O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	55	Pressure not reported	unknown