Interaction of first and second sound in solid 4He:: Properties of a possible Bose condensate -: art. no. 095301

被引：41

作者：

Goodkind, JM ^{[1
]}

机构：

[1] Univ Calif San Diego, La Jolla, CA 92093 USA

来源：

PHYSICAL REVIEW LETTERS | 2002年 / 89卷 / 09期

关键词：

D O I：

10.1103/PhysRevLett.89.095301

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A previous experiment in this laboratory found that the addition of a few tens of parts per 10(6) of He-3 impurities to solid He-4 crystals resulted in a phase transition below 200 mK. In the experiment described here the interaction of acoustic waves with waves generated by heat pulses is measured and shows that there is an energy gap in the excitations of the high temperature phase and that coherent waves are carried by nonphonon excitations at the lowest temperatures.

引用

页数：4

共 10 条

[1]

ANDREEV AF, 1969, ZH EKSP TEOR FIZ, V29, P1107

[2]

BUCKINGHAM MJ, 1961, PROGRESS LOW TEMPERA, V3, P80

[3] VACANCIES IN SOLID HE-4 - CONFLICTING EXPERIMENTAL-EVIDENCE [J].