论文标题
观察正常状态下$^3 $ HE的抑制粘度的观察
Observation of suppressed viscosity in the normal state of $^3$He due to superfluid fluctuations
论文作者
论文摘要
通过监视石英调谐叉振荡器的质量因素，我们观察到在超级流体过渡温度（$ t_c $）附近的正常状态下，散装$^3 $ HE的粘度降低了降低。这些波动仅在$ t_c $的$100μ$ K之内发现，在订购的理论建模中起着至关重要的作用；他们编码有关费米液体参数，配对对称性和散射相移的详细信息。对于在强烈限制下，超级流体$^3 $^3 $的运输探针对于运输探针至关重要。在这里，我们表征了波动特征的温度和压力依赖性，发现数据崩溃与预测的理论行为一致。
By monitoring the quality factor of a quartz tuning fork oscillator we have observed a fluctuation-driven reduction in the viscosity of bulk $^3$He in the normal state near the superfluid transition temperature, $T_c$. These fluctuations, which are only found within $100 μ$K of $T_c$, play a vital role in the theoretical modeling of ordering; they encode details about the Fermi liquid parameters, pairing symmetry, and scattering phase shifts. They will be of crucial importance for transport probes of the topologically nontrivial features of superfluid $^3$He under strong confinement. Here we characterize the temperature and pressure dependence of the fluctuation signature, finding data collapse consistent with the predicted theoretical behavior.
