Bradley D I, Fisher S N, Guénault A M, Haley R P, Mulders N, O'Sullivan S, Pickett G R, Roberts J, Tsepelin V
Department of Physics, Lancaster University, Lancaster, LA1 4YB, United Kingdom.
Phys Rev Lett. 2007 Feb 16;98(7):075302. doi: 10.1103/PhysRevLett.98.075302. Epub 2007 Feb 14.
There has been much recent interest in how impurity scattering may affect the phases of the p-wave superfluid 3He. Impurities may be added to the otherwise absolutely pure superfluid by immersing it in aerogel. Some predictions suggest that impurity scattering may destroy orientational order and force all of the superfluid phases to have an isotropic superfluid density. In contrast to this, we present experimental data showing that the response of the A-like phase to superfluid flow is highly anisotropic, revealing a texture that is easily modified by flow.
最近，关于杂质散射如何影响p波超流3He的相态引起了广泛关注。通过将绝对纯净的超流3He浸入气凝胶中，可以向其中添加杂质。一些预测表明，杂质散射可能会破坏取向有序性，并迫使所有超流相具有各向同性的超流密度。与此相反，我们给出的实验数据表明，类A相超流体对超流流动的响应是高度各向异性的，呈现出一种容易被流动改变的纹理。
