Physics – Condensed Matter – Superconductivity
Scientific paper
2009-07-16
Physics
Condensed Matter
Superconductivity
4 page, 5 figures
Scientific paper
Here we report the first angle-resolved photoemission measurement on nearly optimally-doped multi-layer Tl-based superconducting cuprates (Tl-2212 and Tl-1223) and a comparison study to single layer (Tl-2201) compound. A "kink" in the band dispersion is found in all three compounds but exhibits different momentum dependence for the single layer and multi-layer compounds, reminiscent to that of Bi-based cuprates. This layer number dependent renormalization effect strongly implies that the spin resonance mode is unlikely responsible for the dramatic renormalization effect near the antinodal region.
Devereaux Thomas P.
Eisaki Hiroshi
Iyo Akira
Lee Wai Shing
Lu Ding H.
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