Kinks, nodal bilayer splitting, and interband scattering in YBa2Cu3O(6+x).
Phys Rev Lett
; 96(11): 117004, 2006 Mar 24.
Article
em En
| MEDLINE
| ID: mdl-16605854
ABSTRACT
We apply the new-generation angle-resolved photoemission spectroscopy methodology to the most widely studied cuprate superconductor YBa2Cu3O(6+x). Considering the nodal direction, we found noticeable renormalization effects known as kinks both in the quasiparticle dispersion and scattering rate, the bilayer splitting, and evidence for strong interband scattering--all the characteristic features of the nodal quasiparticles detected earlier in Bi2Sr2CaCu2O(8+delta). The typical energy scale and the doping dependence of the kinks clearly point to their intimate relation with the spin-1 resonance seen in the neutron scattering experiments. Our findings strongly suggest a universality of the electron dynamics in the bilayer superconducting cuprates and a dominating role of the spin fluctuations in the formation of the quasiparticles along the nodal direction.
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01-internacional
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MEDLINE
Idioma:
En
Revista:
Phys Rev Lett
Ano de publicação:
2006
Tipo de documento:
Article
País de afiliação:
Alemanha