Hard domain walls in superfluid 3 He-B
Hard domain walls in superfluid 3 He-B
复制标题
超流体 3 He-B 中的硬畴壁
DOI：
10.1103/physrevb.90.184513
复制
发表时间：
2014
影响因子：
3.7
通讯作者：
E. Thuneberg
中科院分区：
文献类型：
--
作者：
M. Silveri;Tero Turunen;E. Thuneberg
本文从理论上研究了3 He-B超流两畴间的平面界面。B-B畴壁的结构取决于超流凝聚能的尺度，因此畴壁的厚度约为Ginzburg-Landau相干长度。我们使用一维Ginzburg-Landau模拟研究了五种不同结构的畴壁的稳定性和衰变方案。我们发现，只有一个结构是稳定的小扰动。我们还认为B-B界面可能是由绝热A到B转变的结果，并研究了B-B界面的织构。B-B界面对自旋-轨道旋转有很强的定向作用，产生与外壁类似的织构。我们研究了平行平板几何中的B-B界面，发现自旋流守恒是这种结构的一个必要条件。稳定的B-B界面产生半量子循环。
We study theoretically planar interfaces between two domains of superfluid 3He-B. The structure of the B-B walls is determined on the scale of the superfluid condensation energy, and thus the domain walls have thickness on the order of the Ginzburg-Landau coherence length. We study the stability and decay schemes of five inequivalent structures of such domain walls using one-dimensional Ginzburg-Landau simulation. We find that only one of the structures is stable against small perturbations. We also argue that B-B interfaces could result from adiabatic A to B transition and study textures at B-B interfaces. The B-B interface has a strong orienting effect on spin-orbit rotation producing textures similar as caused by external walls. We study the B-B interface in a parallel-plate geometry and find that the conservation of spin current sets an essential condition on the structure. The stable B-B interface gives rise to half-quantum circulation.