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Competing orders suppressed by disorder around a hidden quantum critical point in high-T-c cuprate superconductors

Sanna, S., Coneri, F., Rigoldi, A., Concas, G., Giblin, Sean and De Renzi, R. 2010. Competing orders suppressed by disorder around a hidden quantum critical point in high-T-c cuprate superconductors. Physical Review B Condensed Matter and Materials Physics 82 (10) , 100503.

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Abstract

We report extensive muon-spin-rotation measurements on the lightly doped Y1-xCaxBa2Cu3O6+y compound, which allows us to disentangle the effect of disorder, controlled by random Ca2+ substitution, from that of mere doping. A three-dimensional phase diagram of lightly doped cuprates is accurately drawn. It shows a quantum critical point around which a thermally activated antiferromagnetic phase competes with superconductivity. Disorder suppresses both the competing order parameters and the quantum critical point, unveiling an underlying frozen state.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Subjects: Q Science > QC Physics
Publisher: American Physical Society
ISSN: 1098-0121
Last Modified: 04 Jun 2017 04:37
URI: http://orca.cf.ac.uk/id/eprint/41511

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