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1998

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Lattice and magnetic effects in doped manganites


Landau Institute for Theoretical Physics, Russian Academy of Sciences, Moscow, Russian Federation

The ’double exchange’ mechanism and Jahn-Teller instabilities are shown to account for the low-temperature properties of slightly doped LaMnO3 in the framework of the band insulator model. Analysis of the doping of La1-xAxMnO3 with divalent A atoms suggests that Coulomb forces cause holes to be localized near dopants, which makes the formation of conducting clusters along these charged centers a major factor in the physics of such compounds. A percolation theory analysis of experimental data is given. The two-phase coexistence regime and the large-volume Fermi surface at high concentrations are discussed. The relevance of some of the results to doping physics in cuprates is suggested.

Text can be downloaded in Russian. English translation is available on IOP Science or Turpion.
Fulltext: pdf (675 KB)
DOI: 10.1070/PU1998v041n06ABEH000409
URL: http://ufn.ru/en/articles/1998/6/g/
Citation: Gor’kov L P "Lattice and magnetic effects in doped manganites" Phys. Usp. 41 589–594 (1998)
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Оригинал: Горьков Л П «Решеточные и магнитные эффекты в легированных манганитах» УФН 168 665–671 (1998); DOI: 10.3367/UFNr.0168.199806g.0665

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