The Effect of Coulomb Interactions on Phase Separation
The effect of Coulomb interactions on phase separation is studied in a spin-one lattice gas model which is a coarse-grained representation of the charge distribution in high-temperature superconductors. The ground states are determined for the complete range of parameters by using a combination of numerical and analytical techniques. A crossover from phase separated to Wigner crystalline states proceeds via a rich structure of highly symmetric striped and checkerboard phases. There is no devil’s staircase behavior because mixtures of stripes with different period phase separate.
KeywordsPhase Separation Coulomb Interaction Coulomb Energy Striped Phase Range Coulomb Interaction
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