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Theory of Manganites
Takashi Hotta, Elbio Dagotto
In this review, the present status of theories for manganites is discussed. The complex phase diagrams of these materials, with a variety of spin-charge-orbital ordering tendencies…
Unveiling New Magnetic Phases of Undoped and Doped Manganites
Takashi Hotta, Mohammad Moraghebi, Adrian Feiguin +3
Novel ground-state spin structures in undoped and lightly-doped manganites are here investigated based on the orbital-degenerate double-exchange model, by using mean-field and nume…
Nanoscale Phase Separation in Colossal Magnetoresistance Materials: A Lesson for the Cuprates?
Elbio Dagotto, Jan Burgy, Adriana Moreo
A recent vast experimental and theoretical effort in manganites has shown that the colossal magnetoresistance effect can be understood based on the competition of charge-ordered an…
Study of Percolative Transitions with First-Order Characteristics in the Context of CMR Manganites
J. Burgy, M. Mayr, E. Dagotto
The unusual magneto-transport properties of manganites are widely believed to be caused by mixed-phase tendencies and concomitant percolative processes. However, dramatic deviation…
Complex Quantum Phenomena in a Bilayered Calcium Ruthenate
G. Cao, L. Balicas, Y. Xin +4
CaRuO undergoes an antiferromagnetic transition at K, followed by a Mott-like (MI) transition at K. This nonmetallic ground state,…
Phase Diagram of a Model for Diluted Magnetic Semiconductors Beyond Mean-Field Approximations
Gonzalo Alvarez, Matthias Mayr, Elbio Dagotto
A lattice spin-fermion model for diluted magnetic semiconductors (DMS) is investigated numerically, improving on previously used mean-field (MF) approximations. Curie temperatures…
Global versus Local Ferromagnetism in a Model for Diluted Magnetic Semiconductors Studied with Monte Carlo Techniques
Matthias Mayr, Gonzalo Alvarez, Elbio Dagotto
A model recently introduced for diluted magnetic semiconductors by Berciu and Bhatt (PRL 87, 107203 (2001)) is studied with a Monte Carlo technique, and the results are compared to…