Vortex Core Transitions in Superfluid 3He in Uniaxially Anisotropic Aerogel
Vortex Core Transitions in Superfluid 3He in Uniaxially Anisotropic Aerogel
复制标题
单轴各向异性气凝胶超流体 3He 中的涡核转变
DOI：
10.1007/s10909-009-0012-y
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发表时间：
2010
期刊：
影响因子：
--
通讯作者：
R. Ikeda
中科院分区：
文献类型：
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作者：
K. Aoyama;R. Ikeda
通过数值求解微观得到的Ginzburg-Landau方程，研究了单轴压缩和拉伸超流气凝胶中类A相和类B相中单涡的核心结构。研究发现，尽管任何单轴变形都会在压力-温度相图中产生较宽的轴向配对的类A相，但气凝胶中两相的涡核状态与变形类型有很大的关系。在压缩气凝胶中，以前在块体B相中看到的一阶涡核转变(VCT)在类B相中出现在任意压力下，而在相应的类A相中不会出现奇怪的涡核。相比之下，在拉伸的气凝胶中，类B相的VCT会丢失，而在A相的非么正核和极性核之间可能会发生另一种VCT。对这些结果的实验研究希望能理解超流体和气凝胶结构之间的关系。
Core structures of a single vortex in A-like and B-like phases of superfluidin uniaxially compressed and stretched aerogels are studied by numerically solving Ginzburg-Landau equations derived microscopically. It is found that, although any uniaxial deformation leads to a wider A-like phase with the axial pairing in the pressure-temperature phase diagram, the vortex core states in the two phases in aerogel depend highly on the type of deformation. In a compressed aerogel, the first-order vortex core transition (VCT) previously seen in the bulk B phase appears atanypressure in the B-like phase while no strange vortex core is expected in the corresponding A-like phase. By contrast, in a stretched aerogel, the VCT in the B-like phase is lost while another VCT is expected to occur between a nonunitary core and a polar one in the A-like phase. Experimental search for these results is hoped to understand correlation between superfluidand aerogel structure.