Peculiarities in Low Temperature Properties of Doped Manganites A1-xBxMnO3

Details Peculiarities in Low Temperature Properties of Doped Manganites A1-xBxMnO3 Peculiarities in Low Temperature Properties of Doped Manganites A1-xBxMnO3

1999-12-06

arxiv.org/abs/cond-mat/9912097v1

EPJ B14, 459 (2000).

Physics

Condensed Matter

Strongly Correlated Electrons

To appear in EPJ, 35 pages, 5 figures

Scientific paper

10.1007/s100510051054

The phase diagram and low temperature properties of the doped manganites A1-xBxMnO3 are discussed for the concentrations x < 0.4. The transition from insulating antiferromagnetic to metallic ferromagnetic state at x_cr = 0.16 is treated by means of percolation theory. The unifying description of insulating and metallic states is presented. The undoped manganite is a band insulator consisting of ferromagnetic layers, which are coupled antiferromagnetically along the c direction with a low Neel temperature. The metallic phase can be described by the two-band Fermi liquid picture. The behavior of conductivity, spin wave excitations, etc. is analyzed and the comparison with experimental data is carried out.

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