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Temperature dependence of the resistivity of the microfabricated bar at 0 (∎) and (▴). The open circles show the corresponding magnetoresistance ratio defined as . The inset schematically shows the actual device size and geometry.
Normalized conductance versus applied voltage at 10 K (solid curve) and 300 K (dotted curve). The inset shows the temperature dependence of the exponent in the equation of .
(a) Applied-voltage dependence of the normalized conductance in the two measurements at 10 K (“10 K 1st” and “10 K 2nd”). (b) Changes of normalized conductance in the “10 K 1st” measurement.
versus the logarithm of at various temperatures. is defined as , where and are, respectively, the conductances initially and finally measured at 1 μA.
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