Epitaxial growth and electronic structure of Ruddlesden–Popper nickelates (La<i>n</i>+1Ni<i>n</i>O3<i>n</i>+1, <i>n</i> = 1–5)

Abstract

We report the epitaxial growth of Ruddlesden–Popper nickelates, Lan+1NinO3n+1, with n up to 5 by reactive molecular beam epitaxy. X-ray diffractions indicate high crystalline quality of these films, and transport measurements show strong dependence on the n values. Angle-resolved photoemission spectroscopy reveals the electronic structure of La5Ni4O13, showing a large hole-like pocket centered around the Brillouin zone corner with a (π, π) back-folded copy.