Unconventional charge order in a co-doped high-Tc superconductor

Pelc, Damjan and Vučković, Marija and Grafe, Hans-Joachim and Baek, Seung-Ho and Požek, Miroslav (2016) Unconventional charge order in a co-doped high-Tc superconductor. Nature Communications, 7. pp. 12775-7. ISSN 2041-1723

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Charge-stripe order has recently been established as an important aspect of cuprate high-Tc superconductors. However, owing to the complex interplay between competing phases and the influence of disorder, it is unclear how it emerges from the parent high-temperature state. Here we report on the discovery of an unconventional ordered phase between charge-stripe order and (pseudogapped) metal in the cuprate La1.8-xEu0.2SrxCuO4. We use three complementary experiments—nuclear quadrupole resonance, nonlinear conductivity and specific heat—to demonstrate that the order appears through a sharp phase transition and exists in a dome-shaped region of the phase diagram. Our results imply that the new phase is a state, which preserves translational symmetry: a charge nematic. We thus resolve the process of charge-stripe development in cuprates, show that this nematic phase is distinct from high-temperature pseudogap and establish a link with other strongly correlated electronic materials with prominent nematic order.

Item Type: Article
Keywords: high temperature superconductivity ; charge order ; stripes ; nematic phase
Date: 2016
Subjects: NATURAL SCIENCES > Physics
Additional Information: © The Author(s) 2016. This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ . Received: 23 February 2016. Accepted: 01 August 2016. Published online: 08 September 2016.
Divisions: Faculty of Science > Department of Physics
Project code: IP-2013-11-2729
Publisher: Nature Publishing Group
Depositing User: Gordana Stubičan Ladešić
Date Deposited: 02 Nov 2017 15:16
Last Modified: 02 Nov 2017 15:16
URI: http://digre.pmf.unizg.hr/id/eprint/5658

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