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Updated: Jul 3, 2026

Phase Diagram Characterization Using Magnetic Beads as Liquid Carriers
Published on: September 4, 2015
Coulomb-frustrated phase separation phase diagram in systems with short-range negative compressibility
C Ortix1, J Lorenzana, C Di Castro
1Dipartimento di Fisica, Università del Salento and INFN Sezione di Lecce, Via per Arnesano, 73100 Lecce, Italy.
Abstract:
Using numerical techniques and asymptotic expansions we obtain the phase diagram of a paradigmatic model of Coulomb-frustrated phase separation in systems with negative short-range compressibility. The transition from the homogeneous phase to the inhomogeneous phase is generically first order in isotropic three-dimensional systems except for a critical point. Close to the critical point, inhomogeneities are predicted to form a bcc lattice with subsequent transitions to a triangular lattice of rods and a layered structure. Inclusion of a strong anisotropy allows for second- and first-order transition lines joined by a tricritical point.
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