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Monte Carlo determination of the phase diagram of the double-exchange model

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Alonso, J. L. and Capitán, J. A. and Fernández Pérez, Luis Antonio and Guinea, F. and Martín Mayor, Víctor (2001) Monte Carlo determination of the phase diagram of the double-exchange model. Physical review B, 64 (5). ISSN 1098-0121

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Official URL: http://doi.org/10.1103/PhysRevB.64.054408


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Abstract

We study the phase diagram of the double exchange model, with antiferromagnetic interactions, in a cubic lattice both at zero and finite temperature. There is a rich variety of magnetic phases, combined with regions where phase separation takes place. We identify phases, intrinsic to the cubic lattice, which are stable for realistic values of the interactions and dopings. Some of these phases break chiral symmetry, leading to unusual features.


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Additional Information:

© 2001 The American Physical Society. We want to warmly thank Víctor Laliena for a pleasant and fruitful collaboration. It is also a pleasure to thank B. Alascio, A. Aligia, E. Dagotto, and B. Normand, for discussions on this problem. We acknowledge financial support from Grant Nos. PB96-0875, AEN97-1680, AEN97-1693, AEN99-0990 (MEC, Spain), and (07N/0045/98)(C. Madrid). V.M.-M. was supported by the Ministerio de Educación y Cultura. The simulations were carried out in RTNN computers at Zaragoza and Madrid.

Uncontrolled Keywords:Triangular Heisenberg-antiferromagnet; Transition-temperature; Electronic models; Doped manganites; Magnetic order; Kondo-lattice; Spin dynamics; Charge; Separation; Systems.
Subjects:Sciences > Physics
Sciences > Physics > Physics-Mathematical models
ID Code:38715
Deposited On:09 Aug 2016 10:14
Last Modified:09 Aug 2016 10:14

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