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TT: Fachverband Tiefe Temperaturen

TT 9: SC: Poster Session

TT 9.3: Poster

Montag, 22. März 2010, 14:00–18:00, Poster A

Double Photoemission from LSCO and BiSCO — •Deborah Schneider1, Robert Wallauer1, Stefan Voss1, Tobias Bauer1, Birte Ulrich1, Markus Waitz1, Dawiet Haile1, Till Jahnke1, Götz Berner2, Amit Kanigel3, Markus Schöffler4, Horst Schmidt-Böcking1, and Reinhard Dörner11IKF, Universität Frankfurt — 2EP4, Universität Würzburg — 3Technion, Haifa, Israel — 4ALS, Berkeley, USA

We investigate the emission of two electrons by a single photon from LSCO and BiSCO surfaces. Photon energy used was between 20 and 40 eV. The experiment took place at Bessy, the synchrotron in Berlin (single bunch mode). The detection method [1] was a time of flight spectrometer with a position sensitive detector, so that we are able to calculate the full momentum of each electron.

The theory [2] predicts that the back to back correlation of Cooper pairs should be conserved in the final state. Therefore we expect to be able to distinguish the pairs from the isotropic background of scattered electron pairs. We will show a comparison of spectra obtained in the superconducting state and the normal state.

[1] M. Hattass et. al, Rev. Sci. Instr. 75, 2373 (2004)

[2] K. A. Kouzakov and J. Berakdar, Phys. Rev. Lett. 91, 257007 (2003)

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DPG-Physik > DPG-Verhandlungen > 2010 > Regensburg