Stewart M D, Yin Aijun, Xu J M, Valles James M
Department of Physics, Brown University, 182 Hope Street, Providence, RI 02912, USA.
Science. 2007 Nov 23;318(5854):1273-5. doi: 10.1126/science.1149587.
The Cooper pairing mechanism that binds single electrons to form pairs in metals allows electrons to circumvent the exclusion principle and condense into a single superconducting or zero-resistance state. We present results from an amorphous bismuth film system patterned with a nanohoneycomb array of holes, which undergoes a thickness-tuned insulator-superconductor transition. The insulating films exhibit activated resistances and magnetoresistance oscillations dictated by the superconducting flux quantum h/2e. This 2e period is direct evidence indicating that Cooper pairing is also responsible for electrically insulating behavior.
在金属中使单个电子结合形成对的库珀配对机制，能让电子规避泡利不相容原理，并凝聚成单一的超导或零电阻状态。我们展示了由纳米蜂窝状孔阵列图案化的非晶铋薄膜系统的结果，该系统经历了厚度可调的绝缘体 - 超导体转变。绝缘薄膜表现出由超导磁通量子h/2e决定的激活电阻和磁阻振荡。这个2e周期是直接证据，表明库珀配对也导致了电绝缘行为。
