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Phys. Rev. Lett. 93, 186405 (2004) [4 pages]

4f-Electron Localization in CexLa1-xMIn5 with M=Co, Rh, or Ir

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N. Harrison1, U. Alver2, R. G. Goodrich3, I. Vekhter3, J. L. Sarrao4, P. G. Pagliuso4, N. O. Moreno4, L. Balicas5, Z. Fisk5,*, D. Hall5,†, Robin T. Macaluso6, and Julia Y. Chan6
1National High Magnetic Field Laboratory, LANL, MS-E536, Los Alamos, New Mexico 87545, USA
2Department of Physics, Kahramanmaras Sutcu Imam University, 46100 K. Maras, Turkey
3Department of Physics and Astronomy, Louisiana State University, Baton Rouge, Louisiana 70803, USA
4Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
5National High Magnetic Field Laboratory, 1800 East Paul Dirac Drive, Tallahassee, Florida 32310, USA
6Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803, USA

Received 4 May 2004; published 29 October 2004

de Haas–van Alphen measurements on CexLa1-xMIn5 yield contrasting types of behavior that depend on whether M=Co and Ir or M=Rh. A stronger x-dependent scattering in the case of M=Co and Ir is suggestive of a stronger relative coupling, J/W, of the conduction electrons to the 4f electrons, which would then account for the development of a heavy composite Fermi-liquid state as x→1. The failure of a composite Fermi-liquid state to form for any x in the case of M= Rh is shown to be inconsistent with theoretical models that propose antiferromagnetism to result from spin-density-wave formation.

© 2004 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.93.186405
DOI:
10.1103/PhysRevLett.93.186405
PACS:
71.45.Lr, 71.18.+y, 71.20.Ps

*Present address: Department of Physics, University of California, Davis, CA 95916.

†Present address: American Physical Society, 1 Research Road, P.O. Box 9000, Ridge, NY 11961.

 
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