caa a22 4500 445365811 CHVBK 20180317142930.0 cr unu---uuuuu 170323e20110301xx s 000 0 eng 10.1007/s10909-010-0301-5 doi (NATIONALLICENCE)springer-10.1007/s10909-010-0301-5 On the Stability of Small Vacancy Clusters in Solid 4He [Elektronische Daten] [Y. Lutsyshyn, R. Rota, J. Boronat] We study numerically properties of multiple vacancies in solid 4He at zero temperature. Up to four vacancies were introduced into the solid through incommensuration between the number of available lattice sites and the actual number of atoms. Vacancy-vacancy correlation function increases at very short distances indicating effective vacancy attraction between vacancies located on nearby lattice sites. The decay of the pair correlation function at large distances puts an upper bound on the absolute value of the binding energy varying from 4mK at melting density to 150mK at the highest considered density $\rho=32.2~\mbox{nm$^{-3}$}$, and no lower bound; either the four-vacancy clusters are unbound, or are bound too weakly for the temperatures of the supersolid experiments. Springer Science+Business Media, LLC, 2010 Vacancy nationallicence Solid helium nationallicence Supersolid nationallicence Lutsyshyn Y. Departament de Física i Enginyeria Nuclear, Universitat Politècnica de Catalunya, Campus Nord B4-B5, 08034, Barcelona, Spain aut Rota R. Departament de Física i Enginyeria Nuclear, Universitat Politècnica de Catalunya, Campus Nord B4-B5, 08034, Barcelona, Spain aut Boronat J. Departament de Física i Enginyeria Nuclear, Universitat Politècnica de Catalunya, Campus Nord B4-B5, 08034, Barcelona, Spain aut Journal of Low Temperature Physics Springer US; http://www.springer-ny.com 162/5-6(2011-03-01), 455-463 0022-2291 162:5-6<455 2011 162 10909 https://doi.org/10.1007/s10909-010-0301-5 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10909-010-0301-5 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Lutsyshyn Y. Departament de Física i Enginyeria Nuclear, Universitat Politècnica de Catalunya, Campus Nord B4-B5, 08034, Barcelona, Spain aut NATIONALLICENCE 700 1- Rota R. Departament de Física i Enginyeria Nuclear, Universitat Politècnica de Catalunya, Campus Nord B4-B5, 08034, Barcelona, Spain aut NATIONALLICENCE 700 1- Boronat J. Departament de Física i Enginyeria Nuclear, Universitat Politècnica de Catalunya, Campus Nord B4-B5, 08034, Barcelona, Spain aut NATIONALLICENCE 773 0- Journal of Low Temperature Physics Springer US; http://www.springer-ny.com 162/5-6(2011-03-01), 455-463 0022-2291 162:5-6<455 2011 162 10909 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer