Ultralow Temperature Studies of Heavy Electron Superconductors and Superfluid Helium-Three

这项建议涉及重电子超导体(HFS)的超低温研究和超流氦-3中的声传播。在HFS中，他们提出了一些测量来进一步表征各向异性超导态。他们将研究电磁波的穿透和吸收，并寻找序参数集体模的贡献。他们将把这些测量与对相同样本的超声波吸收研究相关联。使用单轴应力作为对称破缺场，他们将寻找在各向异性超导体中可能出现的多个超导相。这些相将通过超声波、上下临界场和热膨胀测量来表征。他们还将研究杂质和无序对各向异性相的影响。在超流氦-3中，他们提出构造各种非均质态，并研究零声通过它们的传播。

This proposal is concerned with ultralow temperature studies of heavy electron superconductors (HFS) and sound propagation in superfluid helium-three. In HFS they propose a number of measurements to further characterize the anisotropic superconducting states. They will study the penetration and absorption of electromagnetic waves and search for contributions of order-parameter collective modes. They will correlate these mesurements with ultrasound absorption studies on the same samples. Using uniaxial stress as the symmetry breaking field they will search for multiple superconducting phases that can arise in an anisotropic superconductor. These phases will be characterized by ultrasound, lower and upper critical field, and thermal expansion measurements. They will also investigate the effects of impurities and disorder on the anisotropic phases. In superfluid helium-three they propose constructing various inhomogeneous states and study the propagation of zero-sound through them.