Low temperature hidden Fermi-liquid charge transport in under doped La Sr CuO infinite layer electron-doped thin films.

We have studied the low temperature electrical transport properties of La Sr CuO thin films grown by oxide molecular beam epitaxy on (1 1 0) GdScO and TbScO substrates. The transmission electron microscopy measurements and the x-ray diffraction analysis confirmed the epitaxy of the obtained films and the study of their normal state transport properties, removing the ambiguity regarding the truly conducting layer, allowed to highlight the presence of a robust hidden Fermi liquid charge transport in the low temperature properties of infinite layer electron doped cuprate superconductors. These results are in agreement with recent observations performed in other p  and n doped cuprate materials and point toward a general description of the superconducting and normal state properties in these compounds.