| Full text | |
| Author(s): |
de Koning, Maurice
;
Cai, Wei
;
Cazorla, Claudio
;
Boronat, Jordi
Total Authors: 4
|
| Document type: | Journal article |
| Source: | Physical Review Letters; v. 130, n. 1, p. 6-pg., 2023-01-06. |
| Abstract | |
The mass transport properties along dislocation cores in hcp 4He are revisited by considering two types of edge dislocations as well as a screw dislocation, using a fully correlated quantum simulation approach. Specifically, we employ the zero-temperature path-integral ground state (PIGS) method together with ergodic sampling of the permutation space to investigate the fundamental dislocation core structures and their off-diagonal long-range order properties. It is found that the Bose-Einstein condensate fraction of such defective 4He systems is practically null (<= 10-6), just as in the bulk defect-free crystal. These results provide compelling evidence for the absence of intrinsic superfluidity in dislocation cores in hcp 4He and challenge the superfluid dislocation-network interpretation of the mass-flux-experiment observations, calling for further experimental investigation. (AU) | |
| FAPESP's process: | 16/23891-6 - Computer modeling of condensed matter |
| Grantee: | Alex Antonelli |
| Support Opportunities: | Research Projects - Thematic Grants |
| FAPESP's process: | 13/08293-7 - CCES - Center for Computational Engineering and Sciences |
| Grantee: | Munir Salomao Skaf |
| Support Opportunities: | Research Grants - Research, Innovation and Dissemination Centers - RIDC |