Bosons as the Origin for Giant Magnetic Properties of Organic Monolayers

Recently, unusual giant magnetic properties were found experimentally in some organized organic monolayers adsorbed on solid substrates. A model is presented which explains the observed phenomenon. The model is based on the special properties of electrons transferred from the substrate to the layer as a result of the adsorption process. Triplet pairing of those electrons is forced by the special 2D properties of the organic layer. Such pairs are confined within domains in the organic layer and their quantum statistics provide a model that explains the unique magnetization as well as all other features of the experimental observations. The model suggests the possible existence of Bose-Einstein condensation at room temperature on the scale of the domains.

Figure 1

Schematic view of the locations of the transferred electrons on the plane of the positive poles of the attached molecules, away from the molecular electrons.

Figure 2

Singlet (above) and triplet (below) energies are shown in a 5 Å segment as a function of the effective radius (in Å) of the segment.