Elementary steps on the 4He crystal interface probed by 3He atoms

被引：6
|
作者：
Tsepelin, V
Saramäki, JP
Babkin, AV
Hakonen, PJ
Hyvönen, JJ
Luusalo, RM
Parshin, AY
Tvalashvili, GK
机构：
[1] PL Kapitza Phys Problems Inst, Moscow 117334, Russia
[2] Aalto Univ, Low Temp Lab, FIN-02150 Espoo, Finland
来源：
PHYSICAL REVIEW LETTERS | 1999年 / 83卷 / 23期
关键词：
D O I：
10.1103/PhysRevLett.83.4804
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The growth dynamics of c facets, governed by individual Frank-Read type of sources, has been studied at millikelvin temperatures in the presence of small concentrations of He-3 atoms in the liquid. We find that in the spiral growth regime, interaction of He-3 atoms with moving elementary steps on the surface results in additional friction. Our results are compared with theory, where high-frequency (omega greater than or equal to T/(h) over bar) zero-point oscillations of the steps are taken into account. There is a good agreement if we assume the amplitude of these oscillations xi approximate to 5 nm.
引用
收藏
页码：4804 / 4807
页数：4
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