Photon energy dependent photoemission study of La0.7Sr0.3MnO3

Possible origin of photoconductivity in La0.7Ca0.3MnO3

“…27 We have plotted the intensity at A as a function of photon energy and it is shown in Fig. The observed resonant energy matches well with single crystal La 0.7 Sr 0.3 MnO 3 as reported by Falub et al 29 In the resonance process p-electron excites in to the empty part of the Mn 3d band. From Fig.…”

Effect of iron doping on electrical, electronic and magnetic properties of La0.7Sr0.3MnO3

“…The experimental resolution, dependent on the photon energy, was estimated to be 0.25-0.35 eV in the studied photon energy range. For simplicity, here we present the data only for 56 eV of incident photon energy; this is the resonant energy for Mn 3p-3d transition and hence all the features of VBS are clearly visible at this energy [18,20]. It should be noted that for both samples, the sample position (x, y, z), the angle of incident beam, ϕ (ϕ: angle between the surface of the sample and incident beam) and other parameters were kept identical.…”

“…The valence band spectroscopy measurements probe the valence electrons, providing information about the electronic structure and also about the nature and changes in hybridization of the orbitals. The observed results can help in understanding the changes in the electrical properties of materials due to doping or temperature [15][16][17][18][19][20]. The changes in the valence band structure (VBS) on Fe doping can be studied using resonant photoemission spectroscopy which probes the electronic structure [17][18][19].…”

“…The observed results can help in understanding the changes in the electrical properties of materials due to doping or temperature [15][16][17][18][19][20]. The changes in the valence band structure (VBS) on Fe doping can be studied using resonant photoemission spectroscopy which probes the electronic structure [17][18][19]. These studies also provide information on the hybridization of the orbitals and the density of states (DOSs) [17,18].…”

“…The changes in the valence band structure (VBS) on Fe doping can be studied using resonant photoemission spectroscopy which probes the electronic structure [17][18][19]. These studies also provide information on the hybridization of the orbitals and the density of states (DOSs) [17,18]. The x-ray photoelectron spectroscopy (XPS) is a powerful tool to study the chemical or the electronic state of elements on the surface in solids.…”