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EDS profile of the LSMO/STO/LSMO tunnel junction. Black bars indicate the nominal positions of the interfaces. The rising background is probably caused by the wedge-shaped TEM specimen. Inset: High-resolution TEM image of the junction.
Conductance as a function of bias and temperature for junction 1. (a) , no blockade is seen; (b) , the blockade is evident. Inset: conductance is zero below and increases with above.
for 10 and . The curve for is shifted by for visibility. Vertical bars highlight the oscillations.
(a) Temperature dependence of zero bias conductance for junctions 1 and 3. The fit for junction 1 is with and . (b) Tunneling current as a function of the magnetic field at and different bias voltages. Inset: TMR as a function of bias under different magnetic fields at .
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