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

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

Research output: Contribution to journalArticle (Academic Journal)peer-review

15 Citations (Scopus)

Abstract

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.

Original languageEnglish
Article number214502
Pages (from-to)-
Number of pages8
JournalPhysical Review B: Condensed Matter and Materials Physics
Volume85
Issue number21
DOIs
Publication statusPublished - 1 Jun 2012

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