Phase Diagrams for Staged Intercalation Compounds

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Abstract
The phase diagram for a staged intercalation compound is calculated in mean-field theory. At low temperatures, the dependence of the staging on the chemical potential is related to the interlayer interactions responsible for staging. At high temperatures, a dilute stage-1 phase is predicted for all values of the chemical potential. The stage-2-stage-1 transition is second order for temperatures greater than the tricritical temperature. The predicted phase diagrams are related to recent experiments.