English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

We are investigating the properties of vacancies in solid 4He with the exactzero temperature SPIGS method. Our aim is to study the possibility ofphase--separation between vacancies and the perfect crystal. We find asignificant correlation among vacancies both in two and in three dimensionalsolid 4He. In 3D we have considered up to 5 vacancies in a hcp crystal at adensity rho = 0.0293 AA^-3, close to the melting, and in 2D we have consideredup to 6 vacancies in a triangular crystal at rho = 0.0765 AA^-2. In all theconsidered cases the correlation among vacancies seems to display anexponential decay that would suggest the presence of a bound state. Thesystematically sublinear dependence on the number of vacancies found for theactivation energy strengthens the indication of an attractive interaction, evenif we have direct evidence that vacancies do not form a single compact cluster.

Zero-temperature study of vacancies in solid 4He