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APS » Journals » Phys. Rev. Lett. » Volume 100 » Issue 14
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Phys. Rev. Lett. 100, 146403 (2008) [4 pages]

Robust d-Wave Pairing Correlations in the Heisenberg Kondo Lattice Model

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J. C. Xavier
Instituto de Física, Universidade Federal de Uberlândia, C.P. 593, Uberlândia MG 38400-902, Brazil

E. Dagotto
Department of Physics, University of Tennessee, Knoxville, Tennessee 37996, and Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA

Received 20 September 2007; published 10 April 2008

The Kondo lattice model enlarged by an antiferromagnetic coupling JAF between the localized spins is here investigated using computational techniques. Our results suggest the existence of a d-wave superconducting phase close to half-filling mediated by antiferromagnetic fluctuations. This establishes a closer connection between theory and heavy fermion experiments than currently provided by the standard Kondo lattice model with JAF=0.

© 2008 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.100.146403
DOI:
10.1103/PhysRevLett.100.146403
PACS:
71.10.Fd, 74.20.−z, 74.70.Tx
 
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