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Electronic Excitations in Undoped and Lightly Oxygen Doped La2CuO4+y

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Phase Separation in Cuprate Superconductors

Summary

The electronic excitations from 0.1 to 2.5 eV in pure and lightly oxygen doped single-crystal La2CuO4+y are studied by means of polarization and temperature dependent reflectivity and transmission measurements. We discuss the current understanding of these excitations. In particular, we demonstrate that both extended and localized holes interact with optical phonon modes and form large polarons. Moreover, in undoped La2CuO4 we show the existence of weakly electric dipole allowed excitons with multimagnon sidebands.

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Author information

Author notes

  1. J. M. Graybeal

    Present address: Department of Physics, University of Florida, 215 Williamson, Gainesville, FL, 32611, USA

Authors and Affiliations

  1. Department of Physics MIT, Cambridge, MA, 02139, USA

    J. P. Falck, J. D. Perkins, A. Levy, M. A. Kastner, J. M. Graybeal & R. J. Birgeneau

Authors
  1. J. P. Falck
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  2. J. D. Perkins
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  3. A. Levy
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  4. M. A. Kastner
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  5. J. M. Graybeal
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  6. R. J. Birgeneau
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Editor information

Editors and Affiliations

  1. Technische Universität Cottbus, Postfach 101344, D-03013, Cottbus, Germany

    Ernst Sigmund

  2. IBM Research Division, Zürich Research Laboratory, Säumerstrasse 4, CH-8803, Rüschlikon, Switzerland

    K. Alex Müller

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© 1994 Springer-Verlag Berlin Heidelberg

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Falck, J.P., Perkins, J.D., Levy, A., Kastner, M.A., Graybeal, J.M., Birgeneau, R.J. (1994). Electronic Excitations in Undoped and Lightly Oxygen Doped La2CuO4+y . In: Sigmund, E., Müller, K.A. (eds) Phase Separation in Cuprate Superconductors. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-78805-5_22

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  • DOI: https://doi.org/10.1007/978-3-642-78805-5_22

  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-642-78807-9

  • Online ISBN: 978-3-642-78805-5

  • eBook Packages: Springer Book Archive

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