Role of Coulomb correlation on magnetic and transport properties of doped manganites: La0.5Sr0.5MnO3 and LaSr2Mn2O7

Abstract

Results of LSDA and LSDA+U calculations of the electronic structure and magnetic configurations of the 50% hole-doped pseudocubic perovskite La0.5Sr0.5MnO3 and double layered LaSr2Mn2O7 are presented. We demonstrate that the on-site Coulomb correlation (U) of Mn d electrons has a very different influence on the (i) band formations, (ii) magnetic ground states, (iii) interlayer exchange interactions, and (iv) anisotropy of the electrical transport in these two manganites. A possible reason why the LSDA failures in predicting observed magnetic and transport properties of the double layered compound - in contrast to the doped perovskite manganite - is considered on the basis of a p-d hybridization analysis.

11 pages, 3 figures

References in corpus (1)

• Coulomb correlation and magnetic ordering in double-layered manganites: LaSr${}_2$Mn${}_2$O${}_7$

Cited by in corpus (5)

• Variable-range-hopping conductivity of half-doped bilayer manganite LaSr${}_2$Mn${}_2$O${}_7$
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• Inhomogeneous Phases in a Double-Exchange Magnet with Long Range Coulomb Interactions
• Magnon damping and mode softening in quantum double-exchange ferromagnets
• Canted Ferromagnetism in Double Exchange Model with on-site Coulomb Repulsion