First 2D-ACAR Measurements on Cu with the new Spectrometer at TUM

16th International Conference on Positron Annihilation

Weber, J.A.^1 ; Böni, P.^1 ; Ceeh, H.^1 ; Leitner, M.^2,3 ; Hugenschmidt, Ch.^1,2

Physik-Department E21, Technische Universität München, James-Franck-Straße 1, 85748 Garching, Germany^1

FRM II, Technische Universität München, Lichtenbergstraße 1, 85748 Garching, Germany^2

Physik-Department E13, Technische Universität München, James-Franck-Straße 1, 85748 Garching, Germany^3

关键词: Angular correlations;    Positron annihilation radiation;    Standard procedures;    Theoretical calculations;    Two-dimensional measurement;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/443/1/012092/pdf
DOI  :  10.1088/1742-6596/443/1/012092

来源: IOP

【 摘 要 】

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 report on the first results obtained with the new 2D-ACAR spectrometer at the Technische Universitat Munchen (TUM). To get experience in processing and interpreting 2D-ACAR data, first measurements were made on copper. The obtained data are treated with standard procedures and compared to theoretical calculations. It is shown that the measurements are in good agreement with the calculations and that the Fermi surface can be entirely reconstructed using three projections only.