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首页> 外文期刊>Journal of Low Temperature Physics >Transverse Acoustic Spectroscopy of Superfluid ~(3)He in Compressed Aerogel
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Transverse Acoustic Spectroscopy of Superfluid ~(3)He in Compressed Aerogel

机译:压缩气凝胶中超流体〜(3)He的横向声光谱

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摘要

The unique nanoporous structure of aerogel provides a rare opportunity to study the role of anisotropic disorder on an anisotropic superfluid ~(3)He. It has been proposed that uniaxial deformation of compliant aerogel would induce global anisotropy and a few compelling effects of global anisotropy on nature of the superfluid phases have been predicted. We measured high frequency shear acoustic impedance in superfluid ~(3)He at 32 bar in a commercially available 98percent porosity aerogel under uniaxial compression. At 5percent compression, we found evidence of an A-like phase stabilized in a wider temperature width than the A-like phase in uncompressed aerogel.
机译:气凝胶独特的纳米孔结构为研究各向异性病症在各向异性超流体〜(3)He中的作用提供了难得的机会。已经提出,顺应性气凝胶的单轴变形将引起整体各向异性,并且已经预测了整体各向异性对超流体相的性质的一些引人注目的影响。我们在市售的98%孔隙度气凝胶中在单轴压缩下在32 bar的超流体〜(3)He中测量了高频剪切声阻抗。在5%的压缩率下,我们发现有证据表明,与未压缩气凝胶中的A类相相比,A类相在更宽的温度范围内稳定。

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