Electronic Correlations in Manganites
نویسندگان
چکیده
منابع مشابه
Electronic correlations in manganites
The influence of local electronic correlations on the properties of colossal magnetoresistive manganites is investigated. To this end, a ferromagnetic two-band Kondo lattice model is supplemented with the local Coulomb repulsion missing in this model and is analyzed within dynamical mean-field theory. Results for the spectral function, optical conductivity, and the paramagnetic-to-ferromagnetic...
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So called colossal magnetoresistance (CMR) manganites of composition A 1−xB 2+ x MnO3 (A: La, Nd; B: Ca, Sr, Pb) have been subject of intense research during the last years, especially after their re-discovery [1], in part due to their potential use as device applications in the magnetic storage industry, and in part because of the complexity of the mechanisms responsible for unusual, interdepe...
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The dynamics of first-order electronic phase transitions in complex transition metal oxides are not well understood but are crucial in understanding the emergent phenomena of electronic phase separation. We show that a manganite system reduced to the scale of its inherent electronic charge-ordered insulating and ferromagnetic metal phase domains allows for the direct observation of single elect...
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A double exchange model for degenerate eg orbitals with intraand inter-orbital interactions has been studied for the electron doped manganites A1−xBxMnO3 (x > 0.5). We show that such a model reproduces the observed phase diagram and orbital ordering in the intermediate bandwidth regime and the Jahn-Teller effect, considered to be crucial for the region x < 0.5, does not play a major role in thi...
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The sensitivity of transport in colossal magnetoresistance (CMR) manganites to external electric and magnetic fields is examined using field effect configurations with La(0.7)Ca(0.3)MnO(3) (LCMO), Na(0.7)Sr(0.3)MnO(3), La(0.7)Ba(0.3)MnO(3), and La(0.5)Ca(0.5)MnO(3) (0.5-doped LCMO) channels, and ferroelectric PbZr(0.2)Ti(0.8)O(3) (PZT) or dielectric (SrTiO(3)) gates. A large electroresistance (...
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ژورنال
عنوان ژورنال: Physical Review Letters
سال: 2000
ISSN: 0031-9007,1079-7114
DOI: 10.1103/physrevlett.84.5168