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TT: Tiefe Temperaturen

TT 7: Superconductivity & Solids At Low Temperature - Poster Session

TT 7.20: Poster

Montag, 27. März 2006, 14:00–17:45, P1

How superstructure free is superstructure free Pb-BSCCO ? — •L. Dudy, B. Müller, B. Ziegler, A. Krapf, H. Dwelk, R.-P. Blum, C. Janowitz, and R. Manzke — Institut für Physik, Humboldt-Universität zu Berlin, Newtonstraße 15, 12489 Berlin

Pb- substituted BSCCO single crystals have been investigated by LEED and variable temperature VT- STM. While LEED pictures showed no superstructure spots in the range 30eV ≤ E_kin ≤ 320 eV, a closer look by VT- STM revealed that an ordered, alternating topographical formation of nano- domains with and without superstructure occurred. Independent of these geometrical nano- domains a long range ordering in the local density of states detected by corrugation analysis was also observed.