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  Microscopic description of origin of heavy quasiparticles in UPt3

Zwicknagl, G., Yaresko, A. N., & Fulde, P. (2002). Microscopic description of origin of heavy quasiparticles in UPt3. Physical Review B, 65(8): 081103, pp. 081103-081103. doi:10.1103/PhysRevB.65.081103.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0015-31AB-A Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0018-241C-C
Genre: Journal Article

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Zwicknagl, G., Author
Yaresko, A. N.1, Author              
Fulde, P.1, Author              
Affiliations:
1Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863404              

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 Abstract: We propose a microscopic description of heavy fermions in UPt3. It is based on the assumption that two of the three 5f electrons of the U ions are localized. Band-structure calculations based on this supposition reproduce the observed de Haas-van Alphen frequencies very well. The observed enhancement of the quasi-particle mass as compared with the. local-density approximation band mass results from the local Coulomb interaction of the delocalized f electrons with the localized ones. Diagonalization of the Coulomb interaction matrix yields the level scheme of the localized f(2) states. Assuming a splitting of the ground-state doublet by the crystal field of similar size as in UPd2Al3 results in a masks enhancement factor of order 10 in agreement with experiments.

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Language(s): eng - English
 Dates: 2002-02-15
 Publication Status: Published in print
 Pages: -
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 Table of Contents: -
 Rev. Method: Peer
 Identifiers: eDoc: 18645
ISI: 000174303000003
DOI: 10.1103/PhysRevB.65.081103
 Degree: -

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Title: Physical Review B
  Alternative Title : Phys. Rev. B
Source Genre: Journal
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Publ. Info: -
Pages: - Volume / Issue: 65 (8) Sequence Number: 081103 Start / End Page: 081103 - 081103 Identifier: ISSN: 0163-1829