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TT: Fachverband Tiefe Temperaturen

TT 40: Poster Session Correlated Electrons

TT 40.81: Poster

Mittwoch, 13. März 2013, 15:00–19:00, Poster D

Measurement of the full three-dimensional Fermi surface at room temperature by angular correlation of positron annihilation radiation — •Josef Andreas Weber¹, Hubert Ceeh¹, Liviu Chioncel⁴, Kathrin Anna Garb⁴, Christoph Hugenschmidt^1,3, Michael Leitner², and Peter Böni¹ — ¹Technische Universität München, Physik Department E21, D-85748 Garching, Germany — ²Technische Universität München, Physik Department E13, D-85748 Garching, Germany — ³FRM II, Technische Universität München, D-85747 Garching, Germany — ⁴University of Augsburg, Theoretical Physics III, D-86135 Augsburg, Germany

The two-dimensional measurement of the angular correlation of the positron annihilation radiation (2D-ACAR) is a powerful tool to investigate the electronic structure of materials. Here we present the full three-dimensional Fermi surface obtained by temperature dependent 2D-ACAR measurements in combination with common reconstruction algorithms. Although copper is believed to be a well understood system we find discrepancies between measurement and recent ab-initio calculations.