Elettra-Sincrotrone Trieste S.C.p.A. website uses session cookies which are required for users to navigate appropriately and safely. Session cookies created by the Elettra-Sincrotrone Trieste S.C.p.A. website navigation do not affect users' privacy during their browsing experience on our website, as they do not entail processing their personal identification data. Session cookies are not permanently stored and indeed are cancelled when the connection to the Elettra-Sincrotrone Trieste S.C.p.A. website is terminated.
More info

Evolution and control of oxygen order in a cuprate superconductor

X-ray reflections from the illuminated sample area and a surface layer of about 1.5 μm thickness: the striped Q2 domains are photo-switched in the same surface layer thickness of the sample. The Q2 peak profiles along the in-plane k-direction and the out-of-plane l-direction are shown as a function of the X-ray exposure time at constant X-ray photon flux and fixed temperature.

N. Poccia et al., Nature Materials 10, 733 (2011)

The disposition of defects in metal oxides is a key attribute exploited for applications from fuel cells and catalysts to superconducting devices and memristors.
This study reports the X-ray writing of high-quality superconducting regions, derived from defect ordering1, in the superoxygenated layered cuprate, La2CuO4+y. Irradiation of a poor superconductor prepared by rapid thermal quenching results first in the growth of ordered regions, with an enhancement of superconductivity becoming visible only after a waiting time, as is characteristic of other systems such as ferroelectrics, where strain must be accommodated for order to become extended.

Retrieve Article

Evolution and control of oxygen order in a cuprate superconductor;
N. Poccia, M. Fratini, A. Ricci, G. Campi, L. Barba, A. Vittorini-Orgeas, G. Bianconi, G. Aeppli, A. Bianconi; Nature Materials 10, 733 (2011) 10.1038/nmat3088
Last Updated on Monday, 15 February 2016 17:50