2026-06-27T13:55:41Zhttps://docta.ucm.es/rest/oai/request

oai:docta.ucm.es:20.500.14352/596542024-08-30T16:09:47Zcom_20.500.14352_14col_20.500.14352_15

Varela Del Arco, María Sefrioui, Zouhair Arias Serna, Diego Navacerrada, M. A. Lucía Mulas, María Luisa López de la Torre, M. A. León Yebra, Carlos Loos, G. D. Sánchez Quesada, Francisco Santamaría Sánchez-Barriga, Jacobo 2023-06-20T20:08:21Z 2023-06-20T20:08:21Z 1999-11-08 0031-9007 10.1103/PhysRevLett.83.3936 https://hdl.handle.net/20.500.14352/59654 http://dx.doi.org/10.1103/PhysRevLett.83.3936 http://journals.aps.org/ The structure of high quality [YBCO_(N)/PBCO_(M)]_(1000 Å) superlattices, with N ranging between 1 and 12 unit cells and M = 5 unit cells, grown by high oxygen pressure sputtering, is analyzed. Intracell atomic structure of the layers along the c axis and disorder at interfaces is investigated using an x-ray refinement technique. Negligible roughness, step disorder, and interdiffusion are found at the interfaces. Epitaxial mismatch strain results in a surprising reorganization of interatomic distances for the thinnest YBCO layers, which seems to correlated with the decrease in the critical temperature. Intracell structure is invoked as an additional source of T_(c) changes in very thin YBCO layers. eng open access Intracell changes in epitaxially strained YBa_(2)Cu_(3)O_(7-x) ultrathin layers in YBa_(2)Cu_(3)O_(7-x)/PrBa_(2)Cu_(3)O_(7) superlattices journal article