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Ulrich C, Khaliullin G, Guennou M, et al. Spin-Orbital Excitation Continuum and Anomalous Electron-Phonon Interaction in the Mott Insulator LaTiO_{3}. Phys Rev Lett. 2015;115(15):156403doi: 10.1103/PhysRevLett.115.156403.
Ulrich, C., Khaliullin, G., Guennou, M., Roth, H., Lorenz, T., & Keimer, B. (2015). Spin-Orbital Excitation Continuum and Anomalous Electron-Phonon Interaction in the Mott Insulator LaTiO_{3}. Physical review letters, 115(15), 156403. https://doi.org/10.1103/PhysRevLett.115.156403
Ulrich, C, et al. "Spin-Orbital Excitation Continuum and Anomalous Electron-Phonon Interaction in the Mott Insulator LaTiO_{3}." Physical review letters vol. 115,15 (2015): 156403. doi: https://doi.org/10.1103/PhysRevLett.115.156403
Ulrich C, Khaliullin G, Guennou M, Roth H, Lorenz T, Keimer B. Spin-Orbital Excitation Continuum and Anomalous Electron-Phonon Interaction in the Mott Insulator LaTiO_{3}. Phys Rev Lett. 2015 Oct 09;115(15):156403. doi: 10.1103/PhysRevLett.115.156403. Epub 2015 Oct 09. PMID: 26550738.
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Phys Rev Lett. 2015 Oct 09;115(15):156403. doi: 10.1103/PhysRevLett.115.156403. Epub 2015 Oct 09.

Spin-Orbital Excitation Continuum and Anomalous Electron-Phonon Interaction in the Mott Insulator LaTiO_{3}.

Physical review letters

C Ulrich, G Khaliullin, M Guennou, H Roth, T Lorenz, B Keimer

Affiliations

  1. School of Physics, University of New South Wales, Sydney, NSW 2052, Australia.
  2. Max-Planck-Institut für Festkörperforschung, Heisenbergstraße 1, D-70569 Stuttgart, Germany.
  3. Materials Research and Technology Department, Luxembourg Institute of Science and Technology, 41 rue du Brill, L-4422 Belvaux, Luxembourg.
  4. II. Physikalisches Institut, Universität zu Köln, Zülpicher Str. 77, D-50937 Köln, Germany.

PMID: 26550738 DOI: 10.1103/PhysRevLett.115.156403

Abstract

Raman scattering experiments on stoichiometric, Mott-insulating LaTiO_{3} over a wide range of excitation energies reveal a broad electronic continuum which is featureless in the paramagnetic state, but develops a gap of ~800 cm^{-1} upon cooling below the Néel temperature T_{N}=146 K. In the antiferromagnetic state, the spectral weight below the gap is transferred to well-defined spectral features due to spin and orbital excitations. Low-energy phonons exhibit pronounced Fano anomalies indicative of strong interaction with the electron system for T>T_{N}, but become sharp and symmetric for T

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