Ds. Greywall, ANOMALIES IN THE HEAT-CAPACITY OF 2D-FLUID AND SOLID HE-3 AT LOW MK TEMPERATURES - (15TH FRITZ-LONDON-MEMORIAL-AWARD-LECTURE), Physica. B, Condensed matter, 197(1-4), 1994, pp. 1-12
He-3 adsorbed on graphite provides a unique system for studying the ve
ry low temperature properties of two-dimensional Fermi liquids and com
mensurate and incommensurate solids. Here, heat capacity results are p
resented which suggest that the first layer fluid formed at low areal
densities, and also the second layer fluid formed on top of a compress
ed solid He-3 first layer, may undergo superfluid transitions at 3.2 m
K. At higher densities the second layer fluid freezes into a solid reg
istered relative to the first layer. This solid phase exhibits a large
nuclear spin contribution to the heat capacity with a peak at 2.5 mK.
Some of the unusual properties of this solid will be discussed.