论文标题
边界条件对超氟$^{3} $ he-b和烧结金属之间的kapitza抗性的影响
Effect of boundary condition on Kapitza resistance between superfluid $^{3}$He-B and sintered metal
论文作者
论文摘要
了解液态氦气和烧结金属之间的热边界电阻或kapitza电阻的温度依赖性已在低温物理学中构成了数十年的问题。在超级流体$^{3} $ he-b的弹道性中，我们发现可以通过具有宏观几何区域的热激发（准粒子）的散射来描述kapitza抗性，而不是烧结金属的显微镜区域。我们估计，在1000碰撞的顺序上需要进行准粒子，以成功用烧结物进行热度。最后，我们发现，在烧结表面上添加了两个实心$^{4} $的单层kapitza电阻大约翻了一番，我们将其归因于热传递的额外磁性通道，因为非磁性实心$^{4} $他代替了磁性固体固体$^{3} $。
Understanding the temperature dependence of thermal boundary resistance, or Kapitza resistance, between liquid helium and sintered metal has posed a problem in low temperature physics for decades. In the ballistic regime of superfluid $^{3}$He-B, we find the Kapitza resistance can be described via scattering of thermal excitations (quasiparticles) with a macroscopic geometric area, rather than the sintered metal's microscopic area. We estimate that a quasiparticle needs on the order of 1000 collisions to successfully thermalise with the sinter. Finally, we find that the Kapitza resistance is approximately doubled with the addition of two mono-layers of solid $^{4}$He on the sinter surface, which we attribute to an extra magnetic channel of heat transfer being closed as the non-magnetic solid $^{4}$He replaces the magnetic solid $^{3}$He.
