Probing core-electron orbitals by scanning transmission electron microscopy and measuring the delocalization of core-level excitations
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چکیده
By recording low-noise energy-dispersive x-ray spectroscopy maps from crystalline specimens using aberration-corrected scanning transmission electron microscopy, it is possible to probe core-level electron orbitals in real space. Both the 1s and 2p orbitals of Sr and Ti atoms in SrTiO3 are probed, and their projected excitation potentials are determined. This paper also demonstrates experimental measurement of the electronic excitation impact parameter and the delocalization of an excitation due to Coulombic beam-orbital interaction.
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تاریخ انتشار 2016