期刊
JOURNAL OF PHYSICS-CONDENSED MATTER
卷 15, 期 28, 页码 S1911-S1916出版社
IOP PUBLISHING LTD
DOI: 10.1088/0953-8984/15/28/302
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We develop a theory for the electronic excitations in UPt3 which is based on the localization of two of the 5f electrons. The remaining f electron is delocalized and acquires a large effective mass by inducing intra-atomic excitations of the localized ones. The measured de Haas-van Alphen frequencies of the heavy quasiparticles are explained as well as their anisotropic heavy mass. A model calculation for a small cluster reveals why only the largest of the different 5f hopping matrix elements is operative, causing the electrons in other orbitals to localize.
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