Photoemission spectra of LaMnO3 controlled by orbital excitations

J. van den Brink

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We investigate the spectral function of a hole moving in the orbital-ordered ferromagnetic planes of LaMnO3, and show that it depends critically on the type of orbital ordering. While the hole does not couple to the spin excitations, it interacts strongly with the excitations of eg orbitals (orbitons), leading to a new type of quasiparticle with a dispersion on the orbiton energy scale and with strongly enhanced mass and reduced weight. Therefore we predict a large redistribution of spectral weight with respect to the bands found in local density approximation (LDA) or in LDA+U.
Original languageUndefined
Pages (from-to)5174-5177
Number of pages4
JournalPhysical review letters
Issue number24
Publication statusPublished - 2000


  • IR-61226
  • METIS-128740

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