Nature of the nodal kink in angle-resolved photoemission spectra of cuprate superconductors
H. S. Ruiz, A. Badía-Majós
DOI 10.1103/PhysRevB.79.054528 · Physical Review B
Active bibliographic source — not scientific approval
Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.
Abstract
The experimental finding of an ubiquitous kink in the nodal direction of angle-resolved photoemission spectroscopies of superconducting cuprates has been reproduced theoretically. Our model is built on the Migdal-Eliashberg theory for the electron self-energy within the phonon-coupling scenario. Following this perturbative approach, a numerical evaluation of the bare band dispersion energy in terms of the electron-phonon-coupling parameter λ allows a unified description of the nodal-kink effect. Our study reveals that distinction between λ and the technically defined mass-enhancement parameter λ∗ is relevant for the quantitative description of data, as well as for a meaningful interpretation of previous studies. A remarkable agreement between theory and experiment has been achieved for different samples and at different doping levels. The full energy spectrum is covered in the case of LSCO, Bi2212, and overdoped Y123. In the case of underdoped Y123, the model applies to the low-energy region (close to Fermi level).
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. | — | Pressure not reported | unknown |
| Bi2212 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 55 | Pressure not reported | unknown |
Similar papers
Vortex Charges in High-Temperature Superconductors
similarity 0.95Yan Chen et al.
Source status unknown — claims are unverified
Implications of Charge Ordering for Single-Particle Properties of High- Tc Superconductors
similarity 0.95M. I. Salkola et al.
Source status unknown — claims are unverified
Incipient loop-current order in the underdoped cuprate superconductors
similarity 0.95Saheli Sarkar et al.
Source status unknown — claims are unverified
Analysis of the resonance peak and magnetic coherence seen in inelastic neutron scattering of cuprate superconductors: A consistent picture with tunneling and conductivity data
similarity 0.95D. Manske et al.
Source status unknown — claims are unverified
Mixed Lattice and Electronic States in High-Temperature Superconductors
similarity 0.94R. J. McQueeney et al.
Source status unknown — claims are unverified
Influence of the third dimension of quasi-two-dimensional cuprate superconductors on angle-resolved photoemission spectra
similarity 0.94A. Bansil et al.
Source status unknown — claims are unverified