Length-scale dependence of the superconductor-to-insulator quantum phase transition in one dimension
Length-scale dependence of the superconductor-to-insulator quantum phase transition in one dimension
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DOI：
10.1103/physrevlett.81.204
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发表时间：
1998-07-06
影响因子：
8.6
通讯作者：
Haviland, DB
中科院分区：
文献类型：
--
作者：
Chow, E;Delsing, P;Haviland, DB
一维（1D）阵列的小电容约瑟夫森结表现出急剧的转变，从约瑟夫森类行为的库仑阻塞的库珀对隧穿，作为最近的邻居之间的有效约瑟夫森耦合调谐与外部施加的磁场。比较具有255、127和63个结的三个阵列的零偏置电阻，我们观察到一个临界行为，其中电阻外推到T = 0，在临界磁场下与长度无关。与此T = 0的量子相变，它映射到二维经典XY模型的理论进行比较。
One-dimensional (1D) arrays of small-capacitance Josephson junctions demonstrate a sharp transition, from Josephson-like behavior to the Coulomb blockade of Cooper-pair tunneling, as the effective Josephson coupling between nearest neighbors is tuned with an externally applied magnetic field. Comparing the zero-bias resistance of three arrays with 255, 127, and 63 junctions, we observe a critical behavior where the resistance, extrapolated to T = 0, is independent of length at a critical magnetic field. Comparison is made with a theory of this T = 0 quantum phase transition, which maps to the 2D classical XY model.