Observation of a glassy phase of ~4He in the region of supersolid effects

V. N. Grigorev; V. A. Maidanov; V. Yu. RubanskiiS. P. RubetsE. Ya. RudavskiiA. S. RybalkoYe. V. SyrnikovV. A. Tikhii

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Observation of a glassy phase of ~4He in the region of supersolid effects

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High-precision pressure measurements in solid ~4He, grown by the capillary blocking technique, have been made in temperatures range from 50 to 500 mK. The temperature dependence of pressure indicates that aside from the usual phonon contribution ～ T~4, there is an additional contribution ～ T~2, the latter becoming dominant at temperatures T ＜ 300 mK, where an abnormal behavior attributed to supersolidity has been observed. The data suggest the appearance of a glassy phase (that might be responsible for the anomalous behaviors observed previously). A dramatic pressure decrease has been observed under annealing of the samples. The glassy contribution to the pressure can be eliminated in well-annealed crystals.

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《Physical review, B. Condensed matter and materials physics》 |2007年第22期|224524.1-224524.6|共9页
作者
V. N. Grigorev; V. A. Maidanov; V. Yu. RubanskiiS. P. RubetsE. Ya. RudavskiiA. S. RybalkoYe. V. SyrnikovV. A. Tikhii;
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B.I.Verkin Institute for Low Temperature Physics and Engineering, NAS of Ukraine, 47, Lenin Av., Kharkov 61103, Ukraine;

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正文语种英语
中图分类固体物理学;
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solid helium and related quantum crystals; dynamics of relaxation phenomena; thermodynamic properties; other topics in quantum fluids and solids; liquid and solid helium (restricted to new topics in section 67);

Observation of a glassy phase of ~4He in the region of supersolid effects

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