Investigations of positron-annihilation rate in semimetals |
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Authors: | N. Wagner,O. Brü mmer,A. Andreeff,G. Brauer |
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Abstract: | The annihilation rates of thermalized positrons in the semimetals bismuth and antimony were measured. We found that the different rates were not based on the various conduction-electron densities. However, excellent agreement with experimental results was achieved by taking into consideration many-body effects in a random phase approximation. |
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