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High electric field transport of the epitaxial YBaCuO thin films

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3 Author(s)
Asano, K. ; Fac. of Eng. Sci., Osaka Univ., Japan ; Sakuta, Ken ; Kobayashi, Takeshi

Hole-carrier transport in epitaxial (001) Y1Ba2 Cu3Oy thin films under the application of a pulsed high electric field was investigated. In every current-electric field curve of the normal conduction, strong nonlinearity appeared: currents no longer increased as the electric field increased in excess of certain threshold values. Observed current saturation was much more exaggerated with increasing low-field mobility (at lower temperatures or with better-quality films). These new phenomena of the high-temperature superconductors are very similar to the hot-carrier transport well known in semiconducting materials. Comparisons of the threshold field intensity and electron temperatures of oxide superconductors and typical semiconductors were performed

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Magnetics, IEEE Transactions on  (Volume:27 ,  Issue: 2 )