Dresden 2006 – wissenschaftliches Programm
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TT: Tiefe Temperaturen
TT 27: Symposium Twenty Years High-Tc Cuprates - Recent Progress
TT 27.3: Fachvortrag
Donnerstag, 30. März 2006, 10:30–11:00, HSZ 02
“KinksNo-dq, Nodal Bilayer Splitting and Interband Scattering in YBCO — •Sergey Borisenko — IFW Dresden, Institute for Solid State Research, P.O.Box 270116, D-01171 Dresden
We apply the new-generation ARPES methodology to the most widely studied cuprate superconductor YBCO. Considering the nodal direction, we found noticeable renormalization effects known as “kinksNo-dq 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 BSCCO. Typical energy scale and the doping dependence of the “kinksNo-dq clearly point to their intimate relation with the spin-1 resonance seen in the neutron scattering experiments performed on the same samples. Our findings strongly suggest a universality of the electron dynamics in the bilayer superconducting cuprates and a dominating role of the spin-fluctuations in formation of the quasiparticles along the nodal direction.
This work is supported by the Deutsche Forschungsgemeinschaft (Research unit 538).