在超小约瑟夫森结中直接测量约瑟夫森超电流。
Direct measurement of the Josephson supercurrent in an ultrasmall Josephson junction.
作者信息
Steinbach A, Joyez P, Cottet A, Esteve D, Devoret M H, Huber M E, Martinis J M
机构信息
Service de Physique de l'Etat Condensé, CEA-Saclay, F-91191 Gif-sur-Yvette, France.
出版信息
Phys Rev Lett. 2001 Sep 24;87(13):137003. doi: 10.1103/PhysRevLett.87.137003. Epub 2001 Sep 10.
We have measured the supercurrent flowing through a nonhysteretic, ultrasmall, voltage-biased Josephson junction. In contrast with experiments performed so far on hysteretic Josephson junctions, we find a supercurrent peak whose maximum I(s max) increases as the temperature T decreases. The asymptotic T = 0 value of I(s max) agrees with the junction Ambegaokar-Baratoff critical current, as predicted by theory.
我们测量了通过一个非滞回、超小、有电压偏置的约瑟夫森结的超电流。与迄今为止对滞回约瑟夫森结所做的实验不同，我们发现一个超电流峰值，其最大值I(s max)随着温度T的降低而增加。I(s max)的渐近T = 0值与理论预测的结的安贝加卡尔 - 巴拉托夫临界电流一致。
Zotero 插件