Amorphous solid helium in porous media

被引：23

作者：

Bossy, Jacques ^{[1
]}

Hansen, Thomas ^{[2
]}

Glyde, Henry R. ^{[3
]}

机构：

[1] UJF, CNRS, Inst Neel, F-38042 Grenoble 9, France

[2] Inst Max Von Laue Paul Langevin, F-38042 Grenoble, France

[3] Univ Delaware, Dept Phys & Astron, Newark, DE 19716 USA

来源：

PHYSICAL REVIEW B | 2010年 / 81卷 / 18期

关键词：

NEUTRON-DIFFRACTION; SUPERSOLID HELIUM; SHEAR MODULUS; HE-4; MCM-41;

D O I：

10.1103/PhysRevB.81.184507

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We present neutron-scattering measurements of the static structure factor, S(Q), of helium confined in the porous media MCM-41 of pore diameter 47 +/- 1.5 angstrom. The S(Q) shows a transition from the liquid to an amorphous solid as temperature is decreased. No Bragg peaks are observed in the solid and the S(Q) of the amorphous solid differs little from that of the liquid. On freezing, a small additional intensity in S(Q) near the main peak of the liquid S(Q) is observed. The S(Q) is compared with simulations of freezing and melting in porous media. From the measurements of freezing, an approximate phase diagram is determined. A similar amorphous S(Q) is observed in 34 angstrom gelsil.

引用

页数：8

共 45 条

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