Regensburg 2004 – wissenschaftliches Programm
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TT: Tiefe Temperaturen
TT 8: Postersitzung I: Supraleitung
TT 8.45: Poster
Montag, 8. März 2004, 14:30–19:00, Poster A
Temperature dependence of Bismuth-based HTSC as seen in ARPES — •B. Müller1, L. Dudy1, H. Dwelk1, A. Krapf1, C. Janowitz1, H. Höchst2, and R. Manzke1 — 1Humboldt Universität zu Berlin, Institut für Physik, Newtonstr. 15, 12489 Berlin — 2Synchrotron Radiation Center (SRC), Madison/Wisconsin (USA)
Our current investigations focus on the single-, double-, and triple-layer cuprates Bi2201, Bi2223 and Bi2212, respectively. In ARPES measurements of Bi2201 a two-peak structure can be observed, which is dependent on the polarization of the incident light [1,2]. It persists above Tc and vanishes at a higher temperature. There are hints that this temperature corresponds to T*, the temperature where the pseudogap closes. Interestingly this two-peak structure is only visible along one CuO-bond direction. The comparison with a pseudo-1d-model directs interpretations of this feature towards a pseudo-1d-effect. The question is, if this can also be shown for double- and triple-layer compounds.
[1] C. Janowitz, R. Müller, L. Dudy, A. Krapf, R. Manzke, C. Ast, H. Höchst, Europhysics Letters 60 (2002) 615
[2] R. Manzke, R. Müller, C. Janowitz, M. Schneider, A. Krapf, H. Dwelk, Phys. Rev. B 63 (2001) R 100504