Role of the upper branch of the hour-glass magnetic spectrum in the formation of the main kink in the electronic dispersion of high-T${}_{\text{c}}$ cuprate superconductors

Abstract

We investigate the electronic dispersion of the high-T${}_{\mathrm{c}}$ cuprate superconductors using the fully self-consistent version of the phenomenological model, where charge planar quasiparticles are coupled to spin fluctuations. The inputs we use ---the underlying (bare) band structure and the spin susceptibility $\chi$--- are extracted from fits of angle resolved photoemission and inelastic neutron scattering data of underdoped YBa${}_2$Cu${}_3$O${}_{6.6}$ by T. Dahm and coworkers (T. Dahm et al., Nat. Phys. 5, 217 (2009)). Our main results are: (i) We have confirmed the finding by T. Dahm and coworkers that the main nodal kink is, for the present values of the input parameters, determined by the upper branch of the hour-glass of $\chi$. We demonstrate that the properties of the kink depend qualitatively on the strength of the charge-spin coupling. (ii) The effect of the resonance mode of $\chi$ on the electronic dispersion strongly depends on its kurtosis in the quasimomentum space. A low (high) kurtosis implies a negligible (considerable) effect of the mode on the dispersion in the near-nodal region. (iii) The energy of the kink decreases as a function of the angle $\theta$ between the Fermi surface cut and the nodal direction, in qualitative agreement with recent experimental observations. We clarify the trend and make a specific prediction concerning the angular dependence of the kink energy in underdoped YBa${}_2$Cu${}_3$O${}_{6.6}$.

12 pages, 13 figures

References in corpus (19)

• A Common Thread: the pairing interaction for the unconventional superconductors
• Interplay of electron-lattice interactions and superconductivity in Bi2Sr2CaCu2O8+d
• Strength of the Spin-Fluctuation-Mediated Pairing Interaction in a High-Temperature Superconductor
• Kinks in the dispersion of strongly correlated electrons
• Testing the itinerancy of spin dynamics in superconducting Bi2212
• An Isotopic Fingerprint of Electron-Phonon Coupling in High-Tc Cuprates
• Identification of a New Form of Electron Coupling in Bi2Sr2CaCu2O8 Superconductor by Laser-Based Angle-Resolved Photoemission
• Photoemission kinks and phonons in cuprates
• Intermediate Coupling Model of the Cuprates
• Coexistence of metallicity and superconductivity in adjacent bilayers of a high-Tc superconductor
• Coexistence of Two Sharp-Mode Couplings and Their Unusual Momentum Dependence in the Superconducting State of Bi2Sr2CaCu2O8+d Superconductor Revealed by Laser-Based Angle-Resolved Photoemission
• Parity of the Pairing Bosons in a High-Temperature Superconductor
• Broken relationship between superconducting pairing interaction and electronic dispersion kinks in LSCO
• Through a Lattice Darkly -- Shedding Light on Electron-Phonon Coupling in the High T${}_c$ Cuprates
• Kinks and waterfalls as signatures of competing order in angle-resolved photoemission spectra of La_{2-x}Sr_xCuO_4
• Large momentum-dependence of the main dispersion "kink" in the high-Tc superconductor Bi2Sr2CaCu2O8+δ
• Crossover from inelastic magnetic scattering of Cooper pairs to spin-wave dispersion produces low-energy kink in cuprates
• Angle and frequency dependence of self-energy from spin fluctuations mediated d-wave pairing for high temperature superconductors
• Changes in the self-energy and d-wave pairing strength with doping in overdoped La(2-x)Sr(x)CuO4

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