Topological Order in an Antiferromagnetic Tetratic Phase

Daniel Abutbul, Daniel Podolsky

Research output: Contribution to journalArticlepeer-review


We study lattice melting in two-dimensional systems of spinful particles that interact antiferromagnetically. We argue that, for strong spin interactions, single lattice dislocations are forbidden by magnetic frustration. This leads to a melting scenario in which a tetratic phase, containing free dislocation pairs and bound disclinations, separates the solid from the liquid. We demonstrate this phase numerically in a system of hard spheres confined between parallel plates, where spins are represented by the heights of the spheres. In the tetratic phase, the spins are shown to be as antiferromagnetically ordered as allowed by their spatial configuration.

Original languageEnglish (US)
Article number255501
JournalPhysical Review Letters
Issue number25
StatePublished - Jun 24 2022

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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