Low-temperature ferroelectric phase and magnetoelectric coupling in the underdoped La_2CuO_(4+x)

Z. Viskadourakis; I. Radulov; A. P. Petrović; S. Mukherjee; B. M. Andersen; G. Jelbert; N. S. Headings; S. M. Hayden; K. Kiefer; S. Landsgesell; D. N. Argyriou; C. Panagopoulos

doi:10.1103/PhysRevB.85.214502

Low-temperature ferroelectric phase and magnetoelectric coupling in the underdoped La_2CuO_(4+x)

Superconductivity 2012-10-12 v2 Materials Science Strongly Correlated Electrons

Authors: Z. Viskadourakis , I. Radulov , A. P. Petrović , S. Mukherjee , B. M. Andersen , G. Jelbert , N. S. Headings , S. M. Hayden , K. Kiefer , S. Landsgesell , D. N. Argyriou , C. Panagopoulos

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Abstract

We report the discovery of a ferroelectric ground state below 4.5 K in highly underdoped La_2CuO_(4+x) accompanied by slow charge dynamics which develop below T~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 non-stoichiometric carrier doping.

Keywords

Ferroelectric Ground State Underdoped La_2CuO_(4+x) Magnetoelectric Coupling Spin-Charge Coupling Polar Nanoregions High Temperature Superconductor

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@article{arxiv.1111.0050,
  title  = {Low-temperature ferroelectric phase and magnetoelectric coupling in the underdoped La_2CuO_(4+x)},
  author = {Z. Viskadourakis and I. Radulov and A. P. Petrović and S. Mukherjee and B. M. Andersen and G. Jelbert and N. S. Headings and S. M. Hayden and K. Kiefer and S. Landsgesell and D. N. Argyriou and C. Panagopoulos},
  journal= {arXiv preprint arXiv:1111.0050},
  year   = {2012}
}

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7 Pages, 6 Figures, supplementary material

Low-temperature ferroelectric phase and magnetoelectric coupling in the underdoped La_2CuO_(4+x)

Abstract

Keywords

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