Low-temperature anomalies in solid 4He (Review article)

The thermodynamic and mechanic anomalies within the region 0.1–0.5 K experimentally observed in hexagonal close-packed solid 4He crystal are discussed and interpreted on the basis of a polytypic HCP structure (close-packed stack of 2D crystalline planes on the triangular lattice). It elucidated the...

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Bibliographic Details
Published in:Low temperature physics (Woodbury, N.Y.) N.Y.), 2023-08, Vol.49 (8), p.895-910
Main Author: Chishko, K. A.
Format: Article
Language:English
Subjects:
Anomalies
Dislocations
Low temperature
Stacking faults
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Summary:The thermodynamic and mechanic anomalies within the region 0.1–0.5 K experimentally observed in hexagonal close-packed solid 4He crystal are discussed and interpreted on the basis of a polytypic HCP structure (close-packed stack of 2D crystalline planes on the triangular lattice). It elucidated the principal role of the stacking faults and Shockley’s partial dislocations in the quite unexpected low-temperature behavior of the solid 4He.
ISSN:1063-777X
1090-6517
DOI:10.1063/10.0020158