Spikes in the orbital magnetic susceptibility of a two-dimensional electron gas

Abstract
It is shown that the height of the spikes predicted to appear in the orbital magnetic susceptibility of a two-dimensional electron gas at low temperatures depends exponentially on inverse temperature. The spikes are significant only within exponentially narrow regions of the magnetic induction where the chemical potential moves rapidly between adjacent Landau levels. It is pointed out that in systems where the chemical potential is pinned within a magnetic gap (quantum Hall-effect systems) these spikes are expected to disappear.