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Phys. Rev. B 63, 054522 (2001) [5 pages]

Crystal structure assignment for the heavy-fermion superconductor UPt3

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D. A. Walko and J.-I. Hong
Department of Materials Science and Engineering, Northwestern University, Evanston, Illinois 60208

T. V. Chandrasekhar Rao*
Department of Physics and Astronomy, Northwestern University, Evanston, Illinois 60208

Z. Wawrzak
DND-CAT, Northwestern University, Argonne, Illinois 60439

D. N. Seidman
Department of Materials Science and Engineering, Northwestern University, Evanston, Illinois 60208

W. P. Halperin
Department of Physics and Astronomy, Northwestern University, Evanston, Illinois 60208

M. J. Bedzyk
Department of Materials Science and Engineering, Northwestern University, Evanston, Illinois 60208
Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439

Received 6 October 2000; published 16 January 2001

Understanding the normal and superconducting states in UPt3 depends critically on its crystal structure. Based on high-energy x-ray diffraction and transmission electron microscopy, we have determined that the crystal structure of UPt3 is trigonal, not hexagonal as traditionally held. Its trigonal structure provides an interpretation of recent high-field muon spin rotation experiments and may be relevant to the existence of the symmetry-breaking field required by most theoretical models of heavy-fermion superconductivity.

© 2001 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevB.63.054522
DOI:
10.1103/PhysRevB.63.054522
PACS:
74.70.Tx, 61.10.Nz, 61.14.Lj, 75.20.Hr

*On leave from Technical Physics Division, BARC, Bombay-85, India.

 
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