The possibilities for observation and the properties are discussed for two-dimensional spin waves in a nondegenerate spin-polarized atomic hydrogen gas adsorbed on a superfluid helium film. We present results for the spin-transport parameters $D_0$ and μ, based on two-dimensional effective-range theory. The spin-wave quality factor is an order of magnitude smaller than in the volume case.

• Received 16 July 1985

DOI:https://doi.org/10.1103/PhysRevB.32.7195