@article{ISI:000235009500088,
 abstract = {We discuss the phase diagram of the two-orbital model of half-doped
manganites by calculating self-consistently the Jahn-Teller (JT)
distortion patterns, charge, orbital and magnetic order at zero
temperature. We analyze the instabilities of these phases caused by
electron or hole doping away from half-doping, or by the application of
a magnetic-field. For the CE insulating phase of half-doped manganites,
in the intermediate JT coupling regime, we show that there is a
competition between canting of spins (which promotes mobile carriers)
and polaronic self-trapping of carriers by JT defects. This results in a
marked particle-hole asymmetry, with canting winning only on the
electron doped side of half-doping. We also show that the CE phase
undergoes a first-order transition to a ferromagnetic metallic phase
when a magnetic-field is applied, with abrupt changes in the lattice
distortion patterns. We discuss the factors that govern the intriguingly
small scale of the transition fields. We argue that the ferromagnetic
metallic phases involved have two types of charge carriers, localized
and bandlike, leading to an effective two-fluid model.},
 article-number = {035218},
 author = {Cepas, O and Krishnamurthy, HR and Ramakrishnan, TV},
 doi = {10.1103/PhysRevB.73.035218},
 eissn = {2469-9969},
 issn = {2469-9950},
 journal = {PHYSICAL REVIEW B},
 month = {JAN},
 number = {3},
 times-cited = {16},
 title = {Instabilities and insulator-metal transitions in half-doped manganites
induced by magnetic-field and doping},
 unique-id = {ISI:000235009500088},
 volume = {73},
 year = {2006}
}