Berlin 2008 – scientific programme

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TT: Fachverband Tiefe Temperaturen

TT 33: Symposium: High-Temperature Superconductivity

TT 33.11: Talk

Thursday, February 28, 2008, 18:10–18:25, H 0104

ARPES of Bi-cuprates: Did we mix up apples and oranges? — •Lenart Dudy, Olaf Lübben, Beate Müller, Alica Krapf, Helmut Dwelk, Christoph Janowitz, and Recardo Manzke — Humboldt-Universität zu Berlin, Institut für Physik, Newtonstr.15, D-12489 Berlin, Germany

In the two decades of research on the pairing mechanism of the hole-doped high temperature superconductors, angular resolved photoemission (ARPES) has shown to be a good tool to study its microscopic origin [1]. But although two dimensional patterns in scanning tunneling microscopy(STM) have been discovered for a long time [2], the impact of these modulations on the photoemission signal is still widely ignored. Therefore we argue that features extracted out of photoemission experiments like the self energy and its temperature dependence have to be handled more critically. This will be demonstrated in context to an experimental motivated simple model [3], where the photoemission signal is decisively influenced by the modulations found by STM.

[1] A. Damascelli et al., Rev. Mod. Phys. 75, 473 (2003) and reference therein; M.R. Norman and C. Pepin, Rep. Prog. Phys. 66, 1547 (2003) and reference therein

[2] Ø. Fischer et al., Rev. Mod. Phys. 79, 353 (2007) and reference therein

[3] L. Dudy et al., Solid State Comm. 143, 422 (2007)