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Positron annihilation and high-temperature superconductivity

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1 Author(s)
M. Peter ; Department of Physics of Condensed Matter, Université de Genève, 24 Quai Ernst-Ansermet, Ch-I222, Switzerland

After a brief review of the theory of positron annihilation techniques and of experimental principles, we give examples of the successful determination of electron momentum density and Fermi surfaces in alkali metals, transition elements and compounds, and cerium. We then discuss the application of positrons in superconducting oxides. So far the best results have been obtained in YBa2Cu3O7-x, with confirmation of calculated band structure and observation of discontinuity at the Fermi energy.

Note: The Institute of Electrical and Electronics Engineers, Incorporated is distributing this Article with permission of the International Business Machines Corporation (IBM) who is the exclusive owner. The recipient of this Article may not assign, sublicense, lease, rent or otherwise transfer, reproduce, prepare derivative works, publicly display or perform, or distribute the Article.  

Published in:

IBM Journal of Research and Development  (Volume:33 ,  Issue: 3 )