Band alignment at Cu{sub 2}O/La{sub 0.7}Sr{sub 0.3}MnO{sub 3} interface: A combined experimental-theoretical determination

Journal Article · Mon Jul 19 00:00:00 EDT 2010 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.3467206· OSTI ID:21367017

Cantoni, M; Petti, D; Bertacco, R ^[1]; Pallecchi, I; Marre, D ^[2]; Colizzi, G; Filippetti, A; Fiorentini, V ^[3]

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1. Dipartimento di Fisica, L-NESS, Politecnico di Milano, Via Anzani 42, 22100 Como (Italy)
2. CNR-SPIN, C.so Perrone 24, 16152 Genova (Italy)
3. CNR-IOM SLACS and Dipartimento di Fisica, Universita di Cagliari, S.P. Monserrato-Sestu Km. 0.700, Monserrato, 09042 Cagliari (Italy)

Cu{sub 2}O/La{sub 0.7}Sr{sub 0.3}MnO{sub 3} is a promising heterostructure for the realization of all-oxide spintronics devices, with La{sub 0.7}Sr{sub 0.3}MnO{sub 3} (LSMO) and Cu{sub 2}O 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 Cu{sub 2}O/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 Cu{sub 2}O thickness. The calculated energetics indicates that the prevailing interface is between SrO-terminated LSMO and Cu planes of Cu{sub 2}O.

• OSTI ID: 21367017
• Journal Information: Applied Physics Letters, Vol. 97, Issue 3; Other Information: DOI: 10.1063/1.3467206; (c) 2010 American Institute of Physics; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
COPPER
COPPER OXIDES
INTERFACES
LANTHANUM COMPOUNDS
MANGANATES
SEMICONDUCTOR MATERIALS
STRONTIUM OXIDES
THICKNESS
VALENCE
X-RAY PHOTOELECTRON SPECTROSCOPY
ALKALINE EARTH METAL COMPOUNDS
CHALCOGENIDES
COPPER COMPOUNDS
DIMENSIONS
ELECTRON SPECTROSCOPY
ELEMENTS
MANGANESE COMPOUNDS
MATERIALS
METALS
OXIDES
OXYGEN COMPOUNDS
PHOTOELECTRON SPECTROSCOPY
RARE EARTH COMPOUNDS
SPECTROSCOPY
STRONTIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS