We measured the two-dimensional angular correlation of the positron annihilation radiation on a single crystal of UGe2 in the paramagnetic phase. The results of the Lock-Crisp-West transformation, yielding a projection of the electron-positron k density, are compared to band-structure calculations in local-density approximation treating the U 5 f electrons as itinerant, fully localized or according to the assumption that two of the three 5f electrons are localized. The fully localized model shows the best agreement with the experiments.
Fermi surface of UGe2 in the paramagnetic phase
2003
Abstract
We measured the two-dimensional angular correlation of the positron annihilation radiation on a single crystal of UGe2 in the paramagnetic phase. The results of the Lock-Crisp-West transformation, yielding a projection of the electron-positron k density, are compared to band-structure calculations in local-density approximation treating the U 5 f electrons as itinerant, fully localized or according to the assumption that two of the three 5f electrons are localized. The fully localized model shows the best agreement with the experiments.File in questo prodotto:
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