2000 character limit reached
Tensile-Strain Dependent Spin States in Epitaxial LaCoO$_3$ Thin Films (1708.07529v2)
Published 24 Aug 2017 in cond-mat.str-el
Abstract: The spin states of Co${3+}$ ions in perovskite-type LaCoO$_3$, governed by complex interplay between the electron-lattice interactions and the strong electron correlations, still remain controversial due to the lack of experimental techniques which can detect directly. In this letter, we revealed the tensile-strain dependence of spin states, $i. e.$ the ratio of the high- and low-spin states, in epitaxial thin films and a bulk crystal of LaCoO$_3$ via resonant inelastic soft x-ray scattering. The tensile-strain as small as 1.0% was found to realize different spin states from that in the bulk.