Absence of a low-temperature anomaly in the Debye-Waller factor of solid 4He down to 140 mK

被引:27
|
作者
Blackburn, E.
Goodkind, J. M.
Sinha, S. K.
Hudis, J.
Broholm, C.
van Duijn, J.
Frost, C. D.
Kirichek, O.
Down, R. B. E.
机构
[1] Univ Calif San Diego, Dept Phys, La Jolla, CA 92093 USA
[2] Johns Hopkins Univ, Dept Phys & Astron, Baltimore, MD 21218 USA
[3] Univ Complutense Madrid, Fac Ciencias Quim, Dept Quim Inorgan 1, E-28040 Madrid, Spain
[4] Rutherford Appleton Lab, ISIS Facil, Didcot OX11 0QX, Oxon, England
来源
PHYSICAL REVIEW B | 2007年 / 76卷 / 02期
关键词
HCP HE-4; NEUTRON-DIFFRACTION; QUANTUM CRYSTALS; HELIUM; PHASE; HE4;
D O I
10.1103/PhysRevB.76.024523
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The mean-square atomic displacement in hcp-phase solid He-4 has been measured in crystals with a molar volume of 21.3 cm(3). It is temperature independent from 1 K to 140 mK, with no evidence for an anomaly in the vicinity of the proposed supersolid transition. The mean-square displacement is different for in-plane motions (0.122 +/- 0.001 A(2)) and out-of-plane motions (0.150 +/- 0.001 A(2)).
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页数:7
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