Cloetta, DominiqueAriosa, DanielCancellieri, ClaudiaAbrecht, MikeMitrovic, SlobodanPavuna, Davor2007-02-122007-02-12200610.1103/PhysRevB.74.014519https://infoscience.epfl.ch/handle/20.500.14299/2465WOS:0002394264001119023The electronic band structure probed by angle-resolved photoemission spectroscopy on thin epitaxial La_(2−x)Sr_(x)CuO_(4) films under extreme tensile strain shows anomalous features compatible with c-axis dispersion. This result is in striking contrast with the usual quasi-two-dimensional (2D) dispersion observed up to now in most superconducting cuprates, including relaxed and compressively strained La_(2−x)Sr_(x)CuO_(4) films grown under the same conditions. The data were analyzed using a 3D tight-binding dispersion for a body-centeredtetragonal lattice. We relate the enhancement of the c-axis dispersion to the significant displacement of the apical oxygen induced by epitaxial strain.HTSC thin filmsEpitaxial strainARPESThree-dimensional dispersion induced by extreme tensile strain in La_(2−x)Sr_xCuO_4 filmstext::journal::journal article::research article