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APS » Journals » Phys. Rev. B » Volume 68 » Issue 6
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Phys. Rev. B 68, 064403 (2003) [4 pages]

Ferromagnetism in the strong hybridization regime of the periodic Anderson model

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C. D. Batista1, J. Bonča2, and J. E. Gubernatis1
1Center for Nonlinear Studies and Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
2Department of Physics, FMF, University of Ljubljana and J. Stefan Institute, Ljubljana, Slovenia

Received 11 March 2003; published 4 August 2003

We determine exactly the ground state of the one-dimensional periodic Anderson model (PAM) in the strong hybridization regime. In this regime, the low energy sector of the PAM maps into an effective Hamiltonian that has a ferromagnetic ground state for any electron density between half and three-quarters filling. This rigorous result proves the existence of a new magnetic state that was excluded in the previous analysis of the mixed valence systems.

© 2003 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevB.68.064403
DOI:
10.1103/PhysRevB.68.064403
PACS:
75.10.Lp
 
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