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(Color online) (a) curves for CMO/LCMO , CMO/LCMO–H1 , and CMO/LCMO-H2 at . The top left inset indicates the layout of the device. The bottom right inset is the curves at . (b) curves for CMO/LCMO at different temperatures. The bottom right inset shows the curves at 175 and . (c) curves of the first measurement and the fifth measurement at . The inset shows the curves measured in the voltage increasing and decreasing processes. The sweep directions of voltage are indicated by arrows.
(Color online) (a) Voltage dependence of MR for CMO/LCMO at different temperatures. The inset shows the curves measured at under 0 and . (b) Temperature dependence of MR at different voltages.
(Color online) (a) Plots of as a function of . The straight solid lines are fits to the thermionic emission limited current with . (b) Schematic band diagram of the CMO/LCMO junction for . , the Fermi level, is indicated by the dashed line. The region of the insulating layer with traps near the interface is also marked by arrow. The gray areas mark the states being occupied by electrons.
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