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Bandstructure line-up of epitaxial Fe/MgO/Ge heterostructures: A combined x-ray photoelectron spectroscopy and transport study
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10.1063/1.3543851
/content/aip/journal/apl/98/3/10.1063/1.3543851
http://aip.metastore.ingenta.com/content/aip/journal/apl/98/3/10.1063/1.3543851
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Figures

Image of FIG. 1.
FIG. 1.

(a) STEM image of the Fe/MgO/Ge(001) sample. (b) Determination of the MgO VBM by fitting the XPS MgO valence band spectrum (open circles) with the theoretical VBDOS (dashed line) broadened with a Voigt function taking into account the experimental resolution (continuous line). (c) Energy level scheme employed for the determination of the interface band alignment.

Image of FIG. 2.
FIG. 2.

(a) XPS spectra from the Fe/MgO/Ge(n) samples before (top) and after (bottom) Fe growth, showing the core-level peaks employed for the band alignment evaluation and the VBMs. [(b)–(d)] Bandstructure line-up for Fe/MgO/Ge heterostructures with n (panel b), (panel c), and p-doping (panel d).

Image of FIG. 3.
FIG. 3.

(a) Current density vs voltage characteristics, measured at RT, and (b) Richardson plots of the Fe/MgO/Ge(n) and junctions. The saturation current density in panel (b) is assumed to be proportional to , where is the temperature, is the electron charge, is the SBH, and is the Boltzmann constant, so that can be extracted from the slope of vs .

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/content/aip/journal/apl/98/3/10.1063/1.3543851
2011-01-19
2014-04-24
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Bandstructure line-up of epitaxial Fe/MgO/Ge heterostructures: A combined x-ray photoelectron spectroscopy and transport study
http://aip.metastore.ingenta.com/content/aip/journal/apl/98/3/10.1063/1.3543851
10.1063/1.3543851
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