Figure 1

Representative configurations of stable phase categories displayed in the phase diagram: (a) Ch, (b) DNS, (c) DS, (d) AS, (e) AChS, (f) N, (g) 4M, (h) 2D, and (i) another 2D. The large dots correspond to ion-occupied sites and the small dots correspond to ion-vacant sites. The numbers written above each configuration indicate the dimensions of the unit cell; the corresponding ion densities are given in parentheses.Reuse & Permissions

Figure 2

Phase diagram of the 2D FK model along the ${\rho }_e={\rho }_i$ line for a set of $U$ values. The dot-dashed line separates the segregated phase and mixtures of the E phase with periodic phases. Below this line only the E and F phases coexist (in fact, the F phase is also stable slightly above the line, forming three-component mixtures within narrow intervals of densities). Vertical line segments mark intervals of the densities where the corresponding phases (of a given class) are involved in the formation of stable phases. [All the segments, except for those corresponding to the E phase, are moved slightly right or left of the value of $U/(U+8)$.] Bold lines correspond to various types of stripe phases. Mixtures of phases in one category occur within each line segment; when segments overlap, mixtures form between phases in the overlapping categories.Reuse & Permissions

Figure 3

Schematic phase diagram with highlighted regions of stability of the stripe phases.Reuse & Permissions