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

Autor:	Viskadourakis, Z., Radulov, I., Petrović, A. P., Mukherjee, S., Andersen, B. M., Jelbert, G., Headings, N. S., Hayden, S. M., Kiefer, K., Landsgesell, S., Argyriou, D. N., Panagopoulos, C.
Rok vydání:	2011
Předmět:	Condensed Matter - Superconductivity Condensed Matter - Materials Science Condensed Matter - Strongly Correlated Electrons
Zdroj:	Phys. Rev. B 85, 214502 (2012)
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevB.85.214502
Popis:	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. Comment: 7 Pages, 6 Figures, supplementary material
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1111.0050 Zobrazit plný text záznamu View this record from Arxiv