Effects of enhancement for positron annihilation in high-Tc oxides

Article Article scientifique Article Effects of enhancement for positron annihilation in high-Tc oxides eng 1992 author Barbiellini-Amidei Bernardo Gaetano 23399 author Genoud Philippe 904362 author Lerch Philippe 24098 author Jarlborg Thomas N. 21983 author Peter Martin 25013 599-602 10.4028/www.scientific.net/MSF.105-110.599 0255-5476 We apply various approaches describing the enhancement factor for the annihilation rate. The electron and positron band structures were obtained using the LMTO method. The calculated positron lifetimes are very sensitive to the description of the enhancement factor and for that reason it is a crucial test for the theory. Calculations were first tested on simple materials and then applied to the more complicated high-Tc copper oxides. We also present calculations of the momentum densities where the enhancement effect is less dramatic. Positron annihilation studies Superconductivity Dewey 500.2 33 Département de physique de la matière quantique 131 false Materials science forum 105-110 13b9530b-5037-4f6e-b830-0dbd09b9c033 Article (Published version) Restricted Barbiellini_MSF_1992105599.pdf 601753 application/pdf 127bbab9007492444d5baa1a2482c9c6d5b19fb9dc087bf7409a4cdda0e6b627 restrictedAccess Faculté des sciences / Section de physique / Département de physique de la matière quantique

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Effects of enhancement for positron annihilation in high-T_coxides	Materials science forum			1992	72	0

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Genoud, Philippe