Formation of a disordered (Glassy) phase in deformed solid 4He in the region of supersolid state

被引：0
|
作者：
I. A. Degtyarev
A. A. Lisunov
V. A. Maidanov
V. Yu. Rubanskiy
S. P. Rubets
E. Ya. Rudavskii
A. S. Rybalko
V. A. Tikhii
机构：
[1] National Academy of Sciences of Ukraine,Verkin Physicotechnical Institute of Low Temperatures
来源：
Journal of Experimental and Theoretical Physics | 2010年 / 111卷
关键词：
Growth Defect; Glassy Phase; Dislocation Model; Solid Helium; Phonon Contribution;
D O I：
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中图分类号：
学科分类号：
摘要：
A method has been proposed to create disorder in helium crystals by their deformation immediately during the experiment. Precise measurements of the pressure have been performed at a constant volume in samples of various qualities. It has been revealed that excess pressure, which is characterized by the quadratic temperature dependence typical of the disordered glassy phase and of the dislocation contribution to the pressure, is observed in the deformed crystals along with the phonon contribution to the pressure. The effect is observed in the supersolid-state region and disappears after the careful annealing of the crystals. The ultraslow relaxation of the pressure also characteristic of the glassy phase has been observed in the process of annealing of the crystals. The obtained experimental results have been analyzed in the framework of the dislocation model and the model of two-level tunneling states.
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页码：619 / 626
页数：7
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