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 ORCID: https://orcid.org/0000-0003-1876-8619 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:	21 Oct 2022 10:50
URI:	https://orca.cardiff.ac.uk/id/eprint/41511

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