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(a) Electronic phase diagram of (Ref. 8). Lines are the crystallographic (red) and magnetic (blue) transition temperatures. Bottom panel: schematic illustration of the zigzag-type and straight orbital chains which arise from the -orbital ordering of alternate and coherent (ferroic) orbitals, respectively. (b) Comparison of -plane size for bulk crystal (green), films (blue and red), and substrates (black). Compressive strain is induced in the film on LSAO(100) (left) and tensile one is on LSGO(100) (right). (c) Reciprocal space mapping of the (310) peaks of single-layered perovskites for the films on LSAO(100) (blue) and LSGO(100) (red). As dotted lines indicate, the lattice constants of -axis for both films are the same with those of substrates. The solid line and green square denote the tetragonal structure and the bulk peak position, respectively.
Temperature dependence of resistivities for the films on LSAO(100) (blue) and LSGO(100) (red) along the -axis and -axis.
(a) Optical conductivity spectra of thin films on LSAO(100) (blue) and LSGO(100) (red) with light polarization of at 10 K (solid curves) and 300 K (dotted curves). of at 10 K with polarization (a solid black curve) and (a broken black curve) reported by Tobe et al. (Ref. 11) are also shown for comparison. Inset: optical conductivity spectrum of the film on LSGO(100) at 10 K. Two black lines represent the Lorentz oscillators assumed for the fitting with the two components, the intersite and CT excitations. (b) Temperature dependence of for the films on LSAO(100) (blue) and LSGO(100) (red).
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