Dimers in two-dimensional 3He- 4He mixtures
Ground-state properties of two-dimensional 3He- 4He mixtures are studied at zero temperature. A general argument based on the long-ranged attraction of the phonon exchange is given for the existence of 3He dimers in low-concentration mixtures with 4He. The binding energy of dimers ranges from milli- to microkelvins with increasing 4He density. By comparing the 3He impurity chemical potential in 4He with the one in pure 3He we conclude that at finite pressures 3He dimers form a mixture with 4He with a maximum solubility of approximately 3%.
Krotscheck
E
Institut fur Theoretische Physik, Johannes Kepler Universitat, A 4040, Linz, Austria.
Paaso
J
Saarela
M
Schorkhuber
K