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Abstract
The charge density wave in the high-temperature superconductor YBa2Cu3O7−x (YBCO) has two different ordering tendencies differentiated by their c-axis correlations. These correspond to ferro- (F-CDW) and antiferro- (AF-CDW) couplings between CDWs in neighbouring CuO2 bilayers. This discovery has prompted several fundamental questions: how does superconductivity adjust to two competing orders and are either of these orders responsible for the electronic reconstruction? Here we use x-ray diffraction to study YBa2Cu3O6.67 as a function of magnetic field and temperature. We show that regions with F-CDW correlations suppress superconductivity more strongly than those with AF-CDW correlations. This implies that an inhomogeneous superconducting state exists, in which some regions show a fragile form of superconductivity. By comparison of F-CDW and AF-CDW correlation lengths, it is concluded that F-CDW ordering is sufficiently long-range to modify the electronic structure. Our study thus suggests that F-CDW correlations impact both the superconducting and normal state properties of YBCO.
Original language | English |
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Journal | Nature Communications |
Volume | 11 |
Issue number | 1 |
DOIs | |
Publication status | Published - 20 Feb 2020 |
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Dive into the research topics of 'Spatially inhomogeneous competition between superconductivity and the charge density wave in YBa2Cu3O6.67'. Together they form a unique fingerprint.Projects
- 1 Finished
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Superconductivity and Competing Orders in High Tc Cuprates
Carrington, A. (Principal Investigator)
1/12/17 → 7/01/22
Project: Research