The two-dimensional Heisenberg ferromagnet as an approach to adsorbed3He magnetism

Publisher Website
Google Scholar
Abstract
Recent experiments have measured the magnetisation of one to three 3He atomic layers adsorbed on graphite. The properties of this novel system were interpreted by a two-dimensional ferromagnetic Heisenberg model. The authors perform real-space renormalisation group calculations for the two-dimensional triangular Heisenberg model with a magnetic field. They also make a quantum mechanical generalisation of a method which calculates the magnetisation recursively at any point of the global phase diagram. Their theoretical results for T>J=2.1 mK agree well with the experimental data and the exact high-temperature expansion. For T<J the agreement with the data is only qualitative.