New vortex-matter size effect observed in Bi(2)Sr(2)CaCu(2)O(8 + delta).
New vortex-matter size effect observed in Bi(2)Sr(2)CaCu(2)O(8 + delta).
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在 Bi(2)Sr(2)CaCu(2)O(8 delta) 中观察到新的涡旋物质尺寸效应。
DOI：
10.1103/physrevlett.86.3626
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发表时间：
2001
影响因子：
8.6
通讯作者：
T. Tamegai
中科院分区：
文献类型：
--
作者：
Y. M. Wang;M. Fuhrer;A. Zettl;S. Ooi;T. Tamegai
使用局部霍尔磁化测量研究微米级 Bi(2)Sr(2)CaCu(2)O(8 + delta) 单晶中的涡旋物质 3D 到 2D 相变。在给定温度下，第二个磁化峰（可能的 3D--2D 涡旋相变的特征）对于小于临界长度的样品消失。我们建议该临界长度应等于二维涡旋晶格ab平面相关长度R(2D)(c)。 R(2D)(c) 的大小和温度依赖性与 Larkin-Ovchinnikov 集体钉扎理论非常吻合。
The vortex-matter 3D to 2D phase transition is studied in micron-sized Bi(2)Sr(2)CaCu(2)O(8 + delta) single crystals using local Hall magnetization measurements. At a given temperature, the second magnetization peak, the signature of a possible 3D--2D vortex phase transition, disappears for samples smaller than a critical length. We suggest that this critical length should be equated with the 2D vortex lattice ab-plane correlation length R(2D)(c). The magnitude and temperature dependence of R(2D)(c) agree well with Larkin-Ovchinnikov collective pinning theory.