The fabrication of a ZnO nanowire/La0.65Sr0.35MnO3 heterojunction and characterization of its rectifying behavior.
We have fabricated a ZnO nanowire (NW)/La(0.65)Sr(0.35)MnO(3) (LSMO) p-n heterojunction by growing the NWs by an easy aqueous chemical route on a pressed powdered pellet of LSMO. The NWs have hexagonal wurtzite structure with good optical emission properties. The current-voltage (I-V) curves of a single NW junction measured by a scanning tunneling microscope (STM) probe show excellent rectifying behavior with rectification ratio approximately 40, which is comparable to the characteristics of the junction made by large area NW array junctions. Different voltage-dependent current transport mechanisms have been found, which are explained through the use of a band diagram.
Department of Solid State Physics, Indian Association for the Cultivation of Science, Jadavpur, Kolkata, India.
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Mridha
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Basak