Lattice-spin mechanism in colossal magnetoresistive manganites



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Vergés, J. A. and Martín Mayor, Víctor and Brey, L. (2002) Lattice-spin mechanism in colossal magnetoresistive manganites. Physical review letters, 88 (13). ISSN 0031-9007

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We present a single-orbital double-exchange model, coupled with cooperative phonons (the so called breathing modes of the oxygen octahedra in manganites). The model is studied with Monte Carlo simulations. For a finite range of doping and coupling constants, a first-order metal-insulator phase transition is found, which coincides with the paramagnetic-ferromagnetic phase transition.

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© 2002 American Physical Society. We are grateful to F. Guinea, J. L. Alonso, and S. Fratini for discussions. Financial support is acknowledged from Grants No. PB96-0085 (MEC, Spain) and CAM-07N/0008/2001 (Madrid, Spain). V. M-M. is partially supported by E.C. Contract No. HPMF-CT2000-00450.

Uncontrolled Keywords:Double-exchange systems; Phase-separation; Doped manganites; Charge; La(1-x)Sr(x)MnO(3); Perovskites; Diagram; Model; Order.
Subjects:Sciences > Physics > Physics-Mathematical models
ID Code:46776
Deposited On:22 Mar 2018 09:34
Last Modified:03 Apr 2018 10:27

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