Monolayers of 3He on the Surface of Bulk Superfluid 4He

Details Monolayers of 3He on the Surface of Bulk Superfluid 4He Monolayers of 3He on the Surface of Bulk Superfluid 4He

1999-06-17

arxiv.org/abs/cond-mat/9906284v1

Physica B 284 (2000) 158-9

Physics

Condensed Matter

Soft Condensed Matter

2 pages, 3 figures. Submitted to Proc. LT-22 (1999) to appear in Physica B

Scientific paper

10.1016/S0921-4526(99)02224-3

We have used quantum evaporation to investigate the two-dimensional fermion system that forms at the free surface of (initially isotopically pure) 4He when small quantities of 3He are added to it. By measuring the first-arrival times of the evaporated atoms, we have determined that the 3He-3He potential in this system is V_3S/k_B=(0.23+/-0.02) K nm^2 (repulsive) and estimated a value of m_3S=(1.53+/-0.02)m_3 for the zero-coverage effective mass. We have also observed the predicted second layer-state which becomes occupied once the first layer-state density exceeds about 0.6 monolayers.

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