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Low-temperature ferroelectric phase and magnetoelectric coupling in underdoped La2CuO4+x

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Author

  • Z. Viskadourakis
  • I. Radulov
  • A. P. Petrovic
  • S. Mukherjee
  • B. M. Andersen
  • G. Jelbert
  • N. S. Headings
  • S. M. Hayden
  • K. Kiefer
  • S. Landsgesell
  • Dimitri Argyriou
  • C. Panagopoulos
Show all

Summary, in English

We report the discovery of ferroelectricity below 4.5 K in highly underdoped La2CuO4+x accompanied by slow charge dynamics which develop below T similar to 40 K. An anisotropic magnetoelectric response has also been observed, indicating considerable spin-charge coupling in this lightly doped parent high-temperature copper-oxide superconductor. The ferroelectric state is proposed to develop from polar nanoregions, in which spatial inversion symmetry is locally broken due to nonstoichiometric carrier doping.

Publishing year

2012

Language

English

Publication/Series

Physical Review B (Condensed Matter and Materials Physics)

Volume

85

Issue

21

Document type

Journal article

Publisher

American Physical Society

Topic

  • Natural Sciences
  • Physical Sciences

Status

Published

ISBN/ISSN/Other

  • ISSN: 1098-0121