Fig. 3: B-site cation defect distribution at the interface.
From: The emergence of magnetic ordering at complex oxide interfaces tuned by defects
a Values of saturation magnetic moment (mS) and remnant moment (mR), as a function of the LAO thickness, varying from 2 to 30 u.c. at Eg = 0.7 J/cm2. b Atomic-resolution high-angle annular dark-field STEM image of a B-site cation-deficient LAO/STO sample, projected along the <100> direction. The interface is denoted by a dashed line. c Ti L2,3-edge EELS spectra for the LAO/STO heterostructure, collected from each layer position and denoted by the yellow circles in b. d Relative integrated intensity of the Ti L3 t2g EELS spectra (in the upper panel). The values represent the relative Ti distribution across the interface (0 nm), obtained by dividing the t2g peak area of the Ti L3-edge of each layer to that of the bottom-most STO layer, normalized to be 100%. The EDS line scan profile for the atomic ratios of La, Al, Sr and Ti, recorded from the top-most surface of the LAO/STO heterostructure (in the lower panel). e Magnetization density of a tetragonally distorted LAO with a TiAl. f The total spin-polarized density of states of the tetragonally strained LAO with a TiAl (in the left panel) and the corresponding local density of states of the TiAl and six neighbouring oxygen atoms next to a TiAl (in the right panel).
