...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Prog. Theor. Exp. Phys. >Criterion of superfluidity, elementary excitations, and heat capacity singularity in superfluid helium
【24h】

Criterion of superfluidity, elementary excitations, and heat capacity singularity in superfluid helium

机译：超流氦中的超流，基本激发和热容奇异性的判据

获取原文
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

We proceed from the premise that the spectrum of elementary excitations in the normal component in the Landau theory of superfluidity should depend on the superfluid helium temperature. This leads to generalization of the Landau superfluidity criterion. On this basis, taking into account available experimental data on inelastic neutron scattering, it is shown that, in addition to phonon–roton excitations, there is another type of elementary excitation in superfluid helium, which we called helons. The energy spectrum with such momentum dependence was first proposed by Landau. The helon energy spectrum shape and its temperature dependence make it possible to explain the singular behavior of the heat capacity of superfluid helium near its phase transition to the normal state.
机译：我们从前提出发，在朗道超流理论中正态成分中的基本激发光谱应取决于超流氦温度。这导致了Landau超流动性准则的推广。在此基础上，考虑到有关非弹性中子散射的可用实验数据，结果表明，除了声子-顿子激发之外，超流体氦中还有另一种元素激发，我们称为氦。具有这种动量依赖性的能谱最早是由Landau提出的。氦能谱形状及其对温度的依赖性使得可以解释超流体氦在其相变至正常状态附近的热容量的奇异行为。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号