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Electronic properties of (Zn,Co)O systems probed by scanning tunnelling spectroscopy

Keywords: semiconductors , surfaces

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Abstract:

The aim of this paper is to gain insight into theelectronic properties of (Zn,Co)O system - a widebandgap Diluted Magnetic Semiconductors (DMS)showing room temperature (RT) ferromagnetism undern-type doping conditions. On the experimental side, ultrahigh-vacuum scanning tunnelling microscopy andspectroscopy (STM and STS) at variable temperature (T)are used to probe the local electronic structure of thesystem. It is presented the map of the local density ofstates (LDOS) of polar ZnO surfaces. Then, it is possibleto decorate (incorporate) Co atoms onto (into) thesemiconductor.

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