Naslov
^3He, ^4He and mixed helium molecules in two dimensions

Autori
Kilić, Srećko ; Vranješ, Leandra

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Quantum Fluids and Solids International Symposium Abstracts / Boyd, Stephen - Albuquerque (NM), 2003

Skup
QFS2003: Quantum Fluids and Solids International Symposium

Mjesto i datum
Albuquerque (NM), Sjedinjene Američke Države, 03.08.2003. - 08.08.2003

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
helium molecules; binding; 2D; Monte Carlo

Sažetak
As a continuation of our previous work, the ground state properties of helium molecules consisting of up to 6 helium atoms in two dimensions (2D) are studied. The calculations are performed using variational and diffusion Monte Carlo (MC) procedures succesively. For molecules with more than two ^3He atoms fixed node diffusion MC has been employed. A variety of behavior is observed, depending on the number of ^4He and ^3He atoms. Bound states are found for all considered molecules. The binding per particle increases continuously with number of particles for ^4He, but not for ^3He molecules. The particle separation in ^4He molecules is about 10 \AA, while in ^3He molecules it is hundreds times greater. In mixed molecules, with one or two ^3He atoms, ^3He prefers to stay further away from the centre of mass of the molecule than ^4He. In certain cases of mixed molecules, having three and more ^3He atoms, energetics and structure indicate a dimerization of ^3He.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

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