One-dimensional Josephson junction arrays: Lifting the Coulomb blockade by depinning
One-dimensional Josephson junction arrays: Lifting the Coulomb blockade by depinning
复制标题
一维约瑟夫森结阵列：通过脱钉解除库仑封锁
DOI：
10.1103/physrevb.92.045435
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发表时间：
2015
影响因子：
3.7
通讯作者：
A. V. Ustinov
中科院分区：
文献类型：
--
作者：
N. Vogt;R. Schäfer;H. Rotzinger;W. Cui;A. Fiebig;A. Shnirman;A. V. Ustinov
在充电能量占主导地位的一维约瑟夫森结阵列上的实验表明，库仑阻塞在阈值电压下解除，阈值电压与阵列的长度成正比，并且强烈依赖于约瑟夫森能量。我们将这一行为解释为库珀对电荷密度随外加电压的变化。我们假设强电荷无序，并认为脱钉点附近的物理受无序Sine-Gordon模型支配。这使得我们可以使用著名的电荷密度波去钉扎理论。我们的模型与实验数据符合得很好。
Experiments with one-dimensional arrays of Josephson junctions in the regime of dominating charging energy show that the Coulomb blockade is lifted at the threshold voltage, which is proportional to the array's length and depends strongly on the Josephson energy. We explain this behavior as depinning of the Cooper-pair-charge-density by the applied voltage. We assume strong charge disorder and argue that physics around the depinning point is governed by a disordered sine-Gordon-like model. This allows us to employ the well-known theory of charge density wave depinning. Our model is in good agreement with the experimental data.
约瑟夫森连接链中高于电流阈值的耗散机制
DOI：
--
发表时间：
2013
期刊：
影响因子：
--
作者：
R. Schafer;W. Cui;K. Grube;H. Rotzinger;A. Ustinov
通讯作者：
A. Ustinov