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Experimental study reveals electrical transport behavior across [100] tilt grain boundaries in Bi-2212 bicrystals, highlighting structural effects on superconductivity.
We have successfully isolated more than a dozen of naturally-grown [100] tilt Bi/sub 2/Sr/sub 2/CaCu/sub 2/O/sub 8+/spl delta// (Bi-2212) bicrystals for the study of the transport properties of the grain boundary. These bicrystals contain a single clean [100] non-basal-plane-faced tilt grain boundary with various degrees of misorientation. Systematic transport measurements of these grain boundaries were performed in a wide range of temperature and magnetic field by measuring the resistance and the current-voltage characteristics for both single crystals and grain boundaries simultaneously. In addition, the microstructures of the grain boundaries in some of these bicrystals were studied by both conventional TEM and high-resolution electron microscopy (HREM).
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Tsay et al. (1999) studied this question.
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