MULTIPLE-VALUED C-AXIS CRITICAL CURRENT AND PHASE LOCKING IN BI2SR2CACU2O8+DELTA SINGLE CRYSTALS
MULTIPLE-VALUED C-AXIS CRITICAL CURRENT AND PHASE LOCKING IN BI2SR2CACU2O8+DELTA SINGLE CRYSTALS
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BI2SR2CACU2O8 Delta 单晶中的多值 C 轴临界电流和锁相
DOI：
10.1103/physrevb.57.r8135
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发表时间：
1998
影响因子：
3.7
通讯作者：
T. Claeson
中科院分区：
文献类型：
--
作者：
N. Mros;V. Krasnov;A. Yurgens;D. Winkler;T. Claeson
实验发现，Bi2Sr2CaCu2O8 + δ（Bi 2212）单晶c轴方向的临界电流Ic（T）随温度的变化可能有多个分支。因此，在给定温度下，离开零电压状态的概率分布函数P（Ic）可以具有几个最大值，每个最大值对应于Ic（T）的特定分支。我们已经模拟了Bi 2212的Ic（T），将其视为本征约瑟夫森结（JJ）的堆叠。数值模拟与实验定性一致。我们认为，不同的准平衡磁通量模式的存在堆叠JJ的可能是一个原因，在实验中观察到的多值IC。观察到结的相互锁相，导致增加的Ic（T）。
We have experimentally found that the temperature dependence of the critical current in the c-axis direction, I c (T), of Bi 2 Sr 2 CaCu 2 O 8+ δ (Bi2212) single crystals may have multiple branches. At a given temperature, the probability distribution function P (I c) for leaving the zero-voltage state may therefore have several maxima, each corresponding to a particular branch of I c (T). We have modeled the I c (T) for Bi2212, considering it as a stack of intrinsic Josephson junctions (JJ’s). The numerical simulations are in qualitative agreement with the experiment. We argue that the existence of different quasiequilibrium fluxon modes in stacked JJ’s may be a reason for the multiple-valued I c that is observed in the experiments. Mutual phase locking of junctions, resulting in an increased I c (T), is observed.