Dislocation mobility in a quantum crystal: the case of solid 4He.
Phys Rev Lett
; 104(8): 085301, 2010 Feb 26.
Article
in En
| MEDLINE
| ID: mdl-20366942
ABSTRACT
We investigate the structure and mobility of dislocations in hcp 4He crystals. In addition to fully characterizing the five elastic constants of this system, we obtain direct insight into dislocation core structures on the basal plane, which demonstrates a tendency toward dissociation into partial dislocations. Moreover, our results suggest that intrinsic lattice resistance is an essential factor in the mobility of these dislocations. This insight sheds new light on the possible correlation between dislocation mobility and the observed macroscopic behavior of crystalline 4He.
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Collection:
01-internacional
Database:
MEDLINE
Language:
En
Journal:
Phys Rev Lett
Year:
2010
Document type:
Article
Affiliation country: