APS » PROLA » Phys. Rev. Lett. » Volume 90 » Issue 24
< Previous article | Next article >

Phys. Rev. Lett. 90, 247204 (2003) [4 pages]

Dimerization Induced by the RKKY Interaction

Download: PDF (116 kB) or Buy this Article (Use Article Pack) Export: BibTeX or EndNote (RIS)

J. C. Xavier1, R. G. Pereira1, E. Miranda1, and I. Affleck2
1Instituto de Física Gleb Wataghin, Unicamp, C.P. 6165, Campinas SP 13083-970, Brazil
2Department of Physics, Boston University, 590 Commonwealth Avenue, Boston, Massachusetts 02215, USA

Received 26 September 2002; published 19 June 2003

We report the presence of spin dimerization in the ground state of the one-dimensional Kondo lattice model at quarter filling. The emergence of this new phase of the Kondo lattice can be traced to the form of the RKKY interaction between the localized moments and provides the first example of dimerization induced indirectly by itinerant electrons. We propose this dimer ordering as the driving mechanism of the spin-Peierls phase observed in the quasi-one-dimensional organic compounds (Per)2M(mnt)2 (M=Pt, Pd). Moreover, this suggests that a richer phase diagram than the Doniach paradigm may be needed to accommodate the physics of heavy fermion materials.


©2003 The American Physical Society

URL: http://link.aps.org/doi/10.1103/PhysRevLett.90.247204
DOI: 10.1103/PhysRevLett.90.247204
PACS: 75.30.Mb, 71.10.Pm, 71.30.+h, 75.10.–b

[ Abstract  |  Previous article  |  Next article  |  Issue 24 ]