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

• Main Authors: Viskadourakis, Z., Radulov, I., Petrovic, A. P., Mukherjee, S., Andersen, B. M., Jelbert, G., Headings, N. S., Hayden, S. M., Kiefer, K., Landsgesell, S., Argyriou, D. N., Panagopoulos, Christos
• Other Authors: School of Physical and Mathematical Sciences
• Format: Article
• Language: English
• Published: 2013
• Subjects: DRNTU::Science::Physics::Electricity and magnetism
• Online Access: https://hdl.handle.net/10356/95004; http://hdl.handle.net/10220/9324
• Institution: Nanyang Technological University

We report the discovery of ferroelectricity below 4.5 K in highly underdoped La2CuO4+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-temp...