Cu2O/La0.7Sr0.3MnO3 is a promising heterostructure for the realization of all-oxide spintronics devices, with La0.7Sr0.3MnO3 LSMO and Cu2O playing the roles of ferromagnet and semiconductor, respectively. Here we use x-ray photoelectron spectroscopy and first principles calculations to determine the valence band offset at the Cu2O/LSMO interface. The interface band alignment is typical of a p-type semiconductor/metal contact, with an interface barrier of 0.3–0.5 eV depending on Cu2O thickness. The calculated energetics indicates that the prevailing interface is between SrO-terminated LSMO and Cu planes of Cu2O.
Band alignment at Cu2O/La0.7Sr0.3MnO3 interface: A combined experimental-theoretical determination
CANTONI, MATTEO;PETTI, DANIELA;BERTACCO, RICCARDO;
2010-01-01
Abstract
Cu2O/La0.7Sr0.3MnO3 is a promising heterostructure for the realization of all-oxide spintronics devices, with La0.7Sr0.3MnO3 LSMO and Cu2O playing the roles of ferromagnet and semiconductor, respectively. Here we use x-ray photoelectron spectroscopy and first principles calculations to determine the valence band offset at the Cu2O/LSMO interface. The interface band alignment is typical of a p-type semiconductor/metal contact, with an interface barrier of 0.3–0.5 eV depending on Cu2O thickness. The calculated energetics indicates that the prevailing interface is between SrO-terminated LSMO and Cu planes of Cu2O.File in questo prodotto:
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Cu2O_LSMO APL 97_032115 _2010.pdf
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