2008/02/27 by Y. Krockenberger, Yoshiharu Krockenberger, J. Kurian +5 · 88 citations
Chemistry · Physics and Astronomy · #Advanced Condensed Matter Physics #Cerium #Chemistry #Condensed matter physics #Crystallography #Cuprate #Doping #Epitaxy #Ion #Ionic radius #Materials science #Nanotechnology #Phase (matter) #Phase diagram #Physics #Physics of Superconductivity and Magnetism #Quantum mechanics #Superconductivity #Superconductivity in MgB2 and Alloys #cond-mat.mtrl-sci #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevb.77.060505
published in Physical Review B 77(6) (American Physical Society) · 5 pages, 4 figures
openalex publication_date 2008/02/27 · arxiv created 2008/05/07 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
The superconductivity phase diagrams of electron-doped cuprates of the form R_2\ensuremath-xCexCuO4 (with R=La, Pr, Nd, Sm, and Eu) have been determined for cerium compositions 0<x<0.36 in a consistent series of epitaxial thin films grown by reactive molecular beam epitaxy. The use of epitaxial thin films allows the growth of materials away from thermodynamical equilibrium expanding the accessible phase space beyond the availability of bulk material. The superconducting phase space systematically increases with the rare-earth ionic size. The doping concentration where the maximal transition temperature occurs in La_2\ensuremath-xCexCuO4 is considerably shifted to lower doping (x\ensuremath∼0.09) compared to La_2\ensuremath-xSrxCuO4 (x\ensuremath∼0.15). At the same time, the width of the superconducting region is broadened.