Evidence for charged critical behavior in the pyrochlore superconductor RbOs2O6.
Evidence for charged critical behavior in the pyrochlore superconductor RbOs2O6.
复制标题
烧绿石超导体 RbOs2O6 中带电临界行为的证据。
DOI：
10.1103/physrevlett.94.077002
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发表时间：
2004
影响因子：
8.6
通讯作者：
H. Keller
中科院分区：
文献类型：
--
作者：
T. Schneider;R. Khasanov;H. Keller
我们分析了最近发现的超导烧绿石氧化物 RbOs(2)O(6) 的磁穿透深度 (lambda) 数据。我们的结果强烈表明，在 RbOs(2)O(6) 中，带电临界涨落主导着 T(c) 附近 lambda 的温度依赖性。这与在传统超导体中观察到的平均场行为以及在近乎最佳掺杂的铜酸盐超导体中发现的不带电临界行为形成对比。然而，这一发现与带电临界的理论预测以及在欠掺杂 YBa(2)Cu(3)O(6.59) 中观察到的带电临界相一致。
We analyze magnetic penetration depth (lambda) data of the recently discovered superconducting pyrochlore oxide RbOs(2)O(6). Our results strongly suggest that in RbOs(2)O(6) charged critical fluctuations dominate the temperature dependence of lambda near T(c). This is in contrast with the mean-field behavior observed in conventional superconductors and the uncharged critical behavior found in nearly optimally doped cuprate superconductors. However, this finding agrees with the theoretical predictions for charged criticality and the charged criticality observed in underdoped YBa(2)Cu(3)O(6.59).