Study for room-temperature centimeter-sized ballistic transport alloys

在223K以下的低温区，具有以Ni为中心的二十面体Ni5Zr5Nb3团簇的Ni-Nb-Zr-H玻璃合金表现出比Ag大4倍的厘米尺寸的弹道输运行为，这与非晶度的增加有关。在-8 Gpa的压力下，玻璃合金的导电性虽然没有提高，但在22-25K由负变正，其输运机制可以通过一个电子在团簇之间的隧穿来排除。

Ni-Nb-Zr-H glassy alloys with Ni-centered icosahedral Ni_5Zr_5Nb_3 clusters showed centimeter-sized ballistic transport behaviors of 4-fold larger than that of Ag, in low temperature regions up to 223 K, according to increase in degree of amorphousness. Although application of pressure of -8 GPa did not enhance conductivity of the glassy alloys, but changed its sign from negative to positive at 22-25 K. The transport mechanism could be excluded by tunneling of one electron among clusters.