Anisotropic system of quasiparticles in superfluid helium - art. no. 065301

被引：10
作者：
Adamenko, IN
Nemchenko, KE
Slipko, VA
Wyatt, AFG
机构：
[1] Karazin Kharkov Natl Univ, UA-61077 Kharkov, Ukraine
[2] Univ Exeter, Sch Phys, Exeter EX4 4QL, Devon, England
来源：
PHYSICAL REVIEW LETTERS | 2006年 / 96卷 / 06期
基金：
英国工程与自然科学研究理事会;
关键词：
D O I：
10.1103/PhysRevLett.96.065301
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The thermodynamic properties of anisotropic quasiparticle systems of He II are considered for all degrees of anisotropy. It is shown that the thermodynamic functions of a strongly anisotropic phonon-roton system are mainly determined by rotons at all temperatures. Analytical expressions for the roton thermodynamic functions are obtained for all degrees of anisotropy. The maximum anisotropy is limited by the criterion for thermodynamic stability, which is here derived for the whole temperature range.
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页数：4
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