Dresden 2009 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 25: Superconductivity: Cuprate High-Temperature Superconductors 1

TT 25.2: Vortrag

Mittwoch, 25. März 2009, 09:45–10:00, HSZ 304

Evidence for Fermi surface reconstruction in the static stripe phase of La_1.8−xEu_0.2Sr_xCuO₄, x=1/8 — •V. B. Zabolotnyy¹, A. A. Kordyuk^{1, 2}, D. S. Inosov^{1, 3}, D. V. Evtushinsky¹, R. Schuster¹, B. Büchner¹, N. Wizent¹, G. Behr¹, S. Pyon⁴, T. Takayama⁴, H. Takagi⁴, R. Follath⁵, and S. V. Borisenko¹ — ¹Institute for Solid State Research, IFW-Dresden, P.O.Box 270116, D-01171 Dresden, Germany — ²2Institute of Metal Physics of National Academy of Sciences of Ukraine, 03142 Kyiv, Ukraine — ³Max-Planck-Institut für Festkörperforschung, Heisenbergstraße 1, 70569 Stuttgart, Germany — ⁴Department of advanced materials, University of Tokyo, Kashiwanoha 5-1-5, Kashiwa 277-8561, Japan — ⁵BESSY GmbH, Albert-Einstein-Strasse 15, 12489 Berlin, Germany

We present a photoemission study of La_0.8−xEu_0.2Sr_xCuO₄ with doping level x=1/8, where the charge carriers are expected to order forming static stripes. Though the local probes in direct space seem to be consistent with this idea, there has been little evidence found for such ordering in quasiparticle dispersions. We show that the Fermi surface topology of the 1/8 compound develops notable deviations from that observed for La_2−xSr_xCuO₄ in a way consistent with the FS reconstruction expected for the scattering on the antiphase stripe order.